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(1)【ScienceReports. On. of the. Some. Yokobama. National. Noteworthy. University,. Shells. Chiba. Sec.. from. 8,. ⅠⅠ,No.. 1961】. off Ch∂shi,. Prefecture. By. T.. The. molluscan. interesting in. the. and. sea. currents. the. warm. meet. a. The. with is. a. biocoenosis KtJRODA, Mr.. Dr.. OKUTANI, to. Mr.. the. other. gentlemen. He. has. Y.,. students. expresses血is. the. collaboration on. T.,. some. announced. the in. the. the. region. deep. sea. bringing. both may. which. of. region. trawling. Mr.. SATOYOSHI,. the have. he while. of Cape. and. says. Daito. Dr.. OKUTANI. generally. ones. in. the. every. (35o 20′N) region. above. Dr.. to. SAKtJRAI,. is especially. He. HoTATE;. and. for this research. HANAI,. I., Mr.. CHINZEI, National. K.. HASE･ young. and. University.. He. above.. offChashi. on. are. of Kashima-nada. that. cold. C.,. Dr.. the. of. Dr.. NリMr.. provided. Yokobama. done. R.,. advices.. from. The. others.. thanks. cordial. TAXAGI,. biocoenosis. is worked. of batbyal. and. Ch6shi. off. review. short. KAWAA(URA,. just mentioned. been. fauna. molluscan. of. those. OsHIMA. of Cb6shi. north. of assistance. on. Mr.. facilities they. kind. to. note. K.,. a. his. shells. T. and. with. WATANABE,TリMr.. lnstitute. of. T., WATANABE,. suggestions. for the. S.,. thanks. 1956;. Fish-trawling in. very. cold Oya-. and. this region,. collection. extends. OyAM.A,. T., Mr.. researches. 1957. shallow. in. are. Japan, because. season,. winter. species. be. valuable. variable. sincere. those. the. Dr.. Geological. which. in. Here. SEEIGUCⅡⅠ,. the. and. interesting. in CbelSbi. enjoyed. S6y∂-maru. in. Kuroshio. warm. in. dwelling. of HIRANO,. some. HABE,. among. by. Prefecture. biocoenosis. the. especially. observation. region.. Short Hitberto. an. ⅢIRANO,. Mr. of. both. of mollusca. T. for their. indebted. GAWA,. 43'N,. made. this. of. also. 35o. has. report. T.,. study. elements. Chiba. of Cenozic. the. another. Ch6shi,. off. coenosis,. writer. following. K.,. cold. mixed. 1952. since. one. with. and. compose. in. off CheIShi,. region. shio. found. assemblages. important. SHIKA班A. warm. the. mollusca. most. are. elements. year,. except. 200. of Ch6shi,. north. reglOn.. south. this the. available,. deep. and. of. in. f is operated. in. latter. in. collected distribtlted. July and. of Hidacbi. region,. Augest,. (36o 35′N); winter. and.

(2) 30. T.. brhgs. assemblages. MATSUBARA,. caudimaculatus YoKOYA. by. represented. Many. etC.. Beryx. ardent. 20. (m). Names. LowE. Individual. KAWAA(URA,. hira8ei. 4. 8. 13. 50. 54. 100. 100. 110. 60. 58. 110. ‖‥…..... q_alliostoma consor8 (LISCEEE) Umboniun (Suchiuni) giganieu仇 (LESSON).‥‥‥‥‥‥‥‥‥‥‥ Neverita (Glossaulax) didyma (R6DING)....................... Natica (Tectonatica) severa (GouI.D) Phal.ium. strigatγm (GMELIN) ･. Casmar.” Charonw. (REEVE). -. GMEIJIN･. pondera8a sauriae. (REEVE)…. Fu8itriton oregonensi_s (REDF.) Tonna luteostoin? (K古sTER)- ∴ Rapan? thomaswna (CROSSE) Beringws (Japelion) pericochlion. -. ･. -. I. I. ･. -. -. ･. I. (DAI.I.)................ parallelus B･ (J･) hirasei (PILSBRY)............. Aneistrolepi8 trOChoideu8 (DALL)... Neptunea (BERNALDI)‥.... arthritica N･ inter8Culpta (SowERBY) Siphonalia (REBVB) spadieea S. fusoides (REEVE).‥‥...‥..‥..‥ Buecinum i8aO･takii OyAA(A B･ (Volutharpa) perryi (JAY)........ Nassarius (Zeuxis) caelatus (A. AD.). …. ‥. ‥... ”.... ‥. ‥. Fusinus甲erPlexu8. …. ‥. ‥. ‥. ‥. ‥... (A･ AI)A加S). -. ･. -. Fulgorarw KロRODA magna & HABE.. F･ prevostiana (CROPSE) Sydapheケa (DESH.) spengler甘αna -. -. --. -. -. …. ‥. N_aroma (?olatia)nodulifera (Sow.) Glyeymeris vestita (DuNEER) Modiolu8 (Sow.)... elongata Pecten (Notovola) albican8 (ScHR.). Cryptopecten vesieulosu8 (DuNE.). ‥. ‥. …. ‥. ‥. Cha肌a. REEVE.･ fragum Clinocardiu仇6alijTornwnse. Cardium Callista Dosinia. ･. (Fulvia) sinen8i8. ･.. -. -. (Phacosoma). -. I. (DESH.). nuticum SowERBY. REX:VE. pube8CenS. (PI王ILIPPI)‥,‥...‥.‥‥..‥‥‥‥ Paphia Spi8ula Mactra. (DuNEER) (ScHRENCE) (Mactromeris) polynymphavoy甘 (GABB)........................... REEVE (Mactrinula) dolabrala. M. Laternula. sehnelliana sachalinensis. ‥. …. …. -. ‥. sieboldtii. REEVE‥. nipponensis. R., SAKURAI,. 14 110 130. 110. K., HIRANO,. 7 270. 55. 2. 270. 360. ll 600. 140. a,童貞婁･･寧萱表芸,表･Bd表芸表:u. numbers. Semwas甲3'aponwa. Pandalus. and. 38. 50. (GiiNTⅡER),Lycodes. macrochir. boats. of trawling. argenteonitens & OTUEA). as. shell collectors 54. Depth. (TAEI. Sebasiolobus. sPlendens. Sites. Lischkeia. SIIIEAA(A. :. 2. 1 -. ‥. ‥. ‥. 6. ‥. =.. 1.

(3) On. T･,. Some. WATANABE,. T･,. to the. mol】usca. many. rare. H･. HANN,. Arcania. Ethusa. CIJERK,. and to. and. the. gain. by. 150. there. are. pectinifera (MiiLLER SiegoPhiura. as. OPhiuroid. ,. HAAN,. Leucosia C.. philargius. assemblages. Asterina semiregularis. etC.. de. longifrons de. lophos. ∫(L.),. (HERBST),. ciliatus (v. SIEBOLI)), Bathynomus lacunosus. (PENNANT). etc.. the. in. 30 from. table. LoDinia. (L.), In May,. in. shown. attention. wbicb. i brings. as. asteroids. uilida. Calappa. Zbacus. cordatum. species. below. region. Schizaster. as. 31. keen. payed. among. assemblages,. Latereillia. aS. STI班PSON,. echinoid. have. others. scoParius VALENCIENNES. (STIMPSON),. Echinocardium. Prefecture.. bo71elais (FISHER), Certonardoa. CruStaCea. globata. and. represented. Solaster. sexdentaia. ORTMAN,. HoTATE. of neritic. Astropecien. and. Chiba. offChoshi,. noteworthy.. characters,. & TROSC=EL,. sterea. as. trawling. sea. from. these丘sh. with. known. co甲Plicated. & TROSCHEL). K･,. associated. shallow. MtiLI･ER. Shells. AMINAKA,. species. The of. Noteworthy. p･. 1955,. d6derleini. (GRAY). elongata the. was. writer. different. 20. sites,. able. to 600f,. offCh6shi. As. in. shown. by. characterized luteosloma, Pecten. Of. (Mikadotrochus) miles. b〇ttom. site. bitberto. are. as. the. fauna:. neritic. &. HABE,. allochthonous. dead northern. be. APollon Ficus. obesiformis sieboldi (REEVE),. Hastula. Lima. YoKOYAMA,. In June, in p.. table. 1956,. (ToEtTNAGA) writer. The warm. offshore biocoenosis. parts. the. of. This. ones･. this. specimens site. sou也ern. Besides. elements. (MonoPlex) AsPrella. of KtJ-. echo. lischkei KロRODA,. (DuNKER). be. may. species,. Nassaria. (Endemoconus). (Notovola) puncticulata. burchardi. to this. and. DtlNEER,. ArcoPagia. etc.. also. gained. the. deep. members. as. cited. in the. 32.. They. may. be. sea. of. Ch6shi･. deep. (S班ITE),Pecten. Vasticardium. the. of. f deep,. 35-36. site. of. Cymatium. (v. MARTENS),. Tonna. is Perotrochus. tbe丘sbermen.. young. Kelletia. is. uestita,. by. important. the. (PERRY),. hilgendorP. diversa. the. few. (d'ORBIGNY),. subintermedia. serricostata. as. (BiPlex) perca. large. distribution. the. of. a. of benthonic. and. very. mentioned. Baryspira. 2uShiensis. occurring. end. turbidity. of. Glycymeris. one. from. gained. elements. except. shells. may. Y･oE･,. (Merisca). in. japonica,. noticeable. is. 150f. (Mactromeris) polynym-. Maruyamadashi. kind. a. and. most. Which. called. common. following. the. RODA. is not. gained. noteworthy this. bring. to. seems. the. (HILGENDORF),. is rocky. Semicasis. Mactra. below. of. (I(olutharpa)perryi,. species,. lnub6,. assemblage. didyma,. californiense and. neritic. Cape. of this. beyrichii. site;. the. of. neritic. Fusoides, Buccinum. beyrichi. south. current. species. the. Neuerita. as. Clinocardium. albicans, etc.. table,. above. such. Siphonalia. Phavoyi. 6-7. the. Nucula. species. as. StJZUKI,. Limaiula. worthy. of. The. paulula. writer. A.. subauriculata. as. note. and. ADA班S,. the. most. others. Neilonella. (MoNTAGU),. characteristic were. tibana. Cuspidaria. able. to. OyAA(A, golddiana. species gain. some. Nuculana. of. the. minor. ikebei. septentrionalis.

(4) 32. T.. SEIKAMA. Sites. Bottom. 120. (m). Depth. ‥. trOChoideus. (Clinopegma). A.. unicus KtJRODA......... fujitai Plicifusus rhyssoides A.. N. frater Buecinum. (PIIJSBRY) ‥. isao-takii. Riuguhdrillia Aeila schencki Limopsw. instance,. 1. &. Fine. KuRODA.. HyPoringicula. stomachs. found. former. following. the. Amathina. nobilis. are. HARE, P.. the. noted. E.. regia. Amaea. are. here. following. kashimaensis. OyAMA,. SHIE. secunda. &. HABE, KuRODA,. DALL,. E. amyda. nQV.,. hirasei. OTtJKA,. Eocyclina. bathyal. the are. musashiensis. from. types. assemblages. offCh6shi;. (Otukaia). Calliostoma. mentioned;. ADAMS,. Lunatia. Pallida. (BRODERIP. Colus. calameus. hiranoi. subsp･. (WATSON),. Diodora. Lissacteon. Kashimanada. northern. and. yokoyami sp.. DALL,. alaskana. Lunatia-Volutomitra. species;. P.. HABE,. Volutmitra. engonia. called. sp.. A.. -. caudimaculaias. the. among. -. KuRODA,. chosiensis. japonica. to distinguish types. 1. Mud. Lunatia. of Lycodes. Riuguhdrillia. They. M:. sand. HARE,. necessary. DAIJL,. 2. 3 1. clausiformis (Rectifusus) Plicifusus scissuraius jezoensis. 1. 1. Tectonatica. Sow.),. --. HABE. KtTRODA,. OTUKA,. -. 1. ‥. oPPortuna. the. -. 2 ‥. FS:. the. in. -. 1. KIRA‥‥..‥.‥‥‥..‥. Kuzyukuri. the southern. -. (WATSON). shale. It is rather. 2 1. 3. var‥‥...‥‥‥‥,.‥‥. OyAMA. &. -. 2. ‥.. (KuRODA). pacijca KuRODA (ToK.) etc. from. kiheiziebisu. ‥. engonia. Gadila. KuROI)A,. 1. 1. 2. KuRODA. Sandy. 1 1. OyAA4A. uwadokoi. SS:. 3. ‥.. 1. BARTS(コⅡ.... diomeda. AjToria. ‥. -. 4. DAIJL. opisthoplectum Fulgoraria肌agna. ‥. (DALL). constricta. B.. 1. ･. 3. -. 3. 4. DALL. Neptunea. for. ‥. -. 1. I. ‥. (DALL). (PILSBERY). -. 2. ‥.... ‥. 2. 1. ‥. ‥... 3. 1. 3. ‥... ‥.. コ. 2. (Turricula) aeola (WATSON)..... hirasei argenteonitens (TAI(Ⅰ& OyAMA) Bulbus (SA4ITH) var‥‥‥.‥‥‥‥‥ smithi Fusitriton oregonensis (REI)FIELD) Beringius (Japelion) hira8ei (PILSBRY) L.. Anci8trOlepi8. F S. 蓋重宝毒. ＼. PILSBRY. 380. boats. numbers. hirasei. S S. 240. ロ. Li8Chkeia. Volutop8mL8. S S. 180. of. trawling. ‥. 160. S S. sediments Names. Individual. 140. nov.,. Calliostoma. EchinoPholia･･galeodiJbrmis. Solemya assemblage･. Puncturella. (Acharax) In. nobilis. NePtunea. tibai. the latter. fujitai (A･ AD･),. (CalotroPsis)akoya KtJRODA,. nov.,. AntiPlanes. Emarginula. OTtIKA,. &. IKEBE,. fukueae.

(5) On. Some. KIRA,. (KuRODA). Noteworthy. Buccinum. Promantellum. hakodatense GABB.,. disjuncta the. In the above edge. is. of which. breviaxis. HABE, sp.. Halicardia. nov.,. here. the. is. writer. is. of. YoK.. awana. of submarine. means. which. a. 420f. about. ;. A.. these. BARTSCH,. R.. A･. motojimai. Obestoma. oyashio. HABE. soyae. etC･;. Rectiplanes-Obestoma. as. assemblage. Pericoch-. (PILSBRY),. nov･,. Dermatomya. and. DALL,. japonica. unicus sp.. are. members. Cocculina. R. yukiae. hondoana. OKUTANI. the upper. well;. special. AncisirolePis. HABE,. slope,. (DAI,L),Beringius. xestra. DALL,. name. Conchocele. orientalis. (Watson),. aeola. BARTSCH,. KpRODA,. scarp. sharp ”. Ido. depth-. kau,amurai. to. going. very 〟. as. hondoensis. niPPonensis. (AI)I & RvE),. assemblage. a. TroPhonoPsis. aff. diomeda. sp.. Hiaiella. Lischkeia. (DAIJL),Reciiplanes. Aforia. (GMEI.IN) and. the. KuRODA,. ■(ScHRENCK), Mohnia. trochoideus. kawamurai. there. from are. notable. Laminalabruhi 1ion. deep;. 200f. lurrida. jmithi. Portlandia (Portlandella) lischkei (SMITH),. ,. by the丘sbermen. called. about. gained,. of Cb6shi,. (Musashia?). Turricula. Akebiconcha. calcarea. 33. Prefecture.. Fulgoraria. Makiyamaia-Akebiconclul. southeast. 700 f deep,. HABE. (ToK.),. Macoma. calls them. writer. DAIJL,. (Ⅴ.MARTENS),. (Rectisulcus)isaotakii. Chiba. offCh6shi,. sp..affchartium. (Sow.), βenthouoluta hilgendorji RectiPlanes. from. Shells. assernblage. Lunatia-Volutomitra. The current,. The. current.. shio. subzone. adaptive From. the. is that. 20. below. f in. Kashimanada. are. Ringicula. (SMITH),. Odostomia. (DuNKER),. martigyrata tenuis. Acila. (MoNTAGU), Saccella. (K甲ODA),. NoMURA,. niinoi. Pyranculus. deep. a. (GouLD),. Turbonilla KuROI)A,. cyrenoides. dalli. yokoyamai. (Smith), Oblimopa. Clinocardium. californiense(DESK.), Fulvia (REEVE), mutica (REEVE), Mercenaria stimPsoni (GouLD), Callithaca adamsi OxyPerus bernardi (PII,SBRY)SPisula (Mactromeris) polynymavoγi (GABB), Lutraria. forskalii(A. AD.),. su)iftii(BERNARDI),. bathyraphe. (Thestyleda). Pseudogrammatodon. (YoE･),. (L･), Babylonia. (A･ AD･),. Eunucula Nucula. following. the. Myurella. Phialus. YoE.,. gordonis. insignis. gordonis. to. gained bezoar. (Nivetectum) Pallida (GotJLD), RaPana (REEVE), Terebra (Pervicacia) bifrons HINDS,. japonica. Kuro-. warm. of. belong. may. assemblage. Oyashio. cold. of. mass.. water. zone. neritic. ecogroup. assemblage. RectiPlanes-Obestoma of cold. an. Acmaea. species:. E.. Makiyamaia-Akebiconcha. the. while. is. assemblage. Chlamys. ,. Pernnidia and. L.. JoNAS,. maxima. venulosa. Aloides. venusta. sieboldtii ScHRENCK,. REEVE, Hiatella. (GouLD). From. Labiostrombus. jaPonicus (REEVE),. Tecionaiica KIRA,. RaPana. (SMITH),. same. zone. (GouLD),. seuera. thomasina. Dentalium. Neverita. javanicus. (CROSSE), tibanum. didyma. Kelletia No肌RA,. KtJRODA. keenae. (Yo且.),Panope be. may. Kuzyukuri. on. Sinum. (Dentale). orientalis they. etc. ;. assemblage.. the. Schizoihaerus. called are. lischkei Pinna. HABE, A.. japonica. AD.. Mercenaria-Peronidia. gained. (R6DING), N.. (GR. &. &. following reiniana. PIG.), Semicasis KtJRODA,. species:. (DuNKER), persimilia. Hastuli. diuersa. Pectinata japonica (REEVE),.

(6) 34. T.. (DtJNEER), Gomphina. VTasticardi鍵朗burchardi lamwcki,i GRAY .Mcretrix ￡ailed Kelleiia-Gomphina The. littoral fauna. 一tioned sandy the. following. S王ⅠIKAn4A. bottom. Telh'na. and. (Macrid3'sc,uS)melnaegi. iriddla. MARTENS. RoEA4ER,. They. eta.:. be. may. assemblage.. of Cape faunae. is rather. Inub8. that of rock. as. contrasting. to. T王1e Vriter. shore.. the. able. was. men･. above. observe. species.. Localities. Species.. North･south distribution Paci点c along m:. Mucb. c:. CoTnmOn. r:. Rare. ･U. coast.*. P 如く弓. (North latitude). ? 亡弓. ヒd Aeanthochiton dejuippi (TAPPARONE･CANEFRI) Maeros6hisma dila如.ta A. AD. Tugali deeusata AD....‥..‥ T. giga8 (Ⅴ, MARTENS)‥‥.‥ Haliotis (Euh,alioti8)di8Cu8 REEVE. H. (E.) sieboldi REEVE........ TERAMACⅡⅠ Notoacmaea radula N. fu8COViridi8 TBRAMACEI. N. s6hrencki (LIB.)............... Couisella grata (GouLD).......... a. (Conoidac仇ea) heroldi (DuNKER) Cellana toreuma (耳EEVE)‥...…‥... Sow. Calliostoma consors mulliliratum Monodonta labio (L.) Tegula (Chlorostoma) lisch,kei (TAP. & CAN.) T. (C･) argyrosto飢a (PILS･) ‥... ‥. ‥‥‥‥.‥.‥.‥.‥.‥. Umboniu仇(Suchium). Sublaevi8. -. -. ･. gwanteu肌(LESSEN). ‥. Leptothyra (GouLD). a肌uS8itatum Turbo Sol.... (Batillu8) eornutus Lunella coronala coreen8is (RECLtJZ) Littorivaga brevieula (PEILIPPI)…...... Nodilittorina granulari8 (GRAY)‥. Neverita didy他a (RoDING) Primovula rhod,ia (A. AD.)‥‥…‥.‥.‥‥ Proterato (Sulceraio) callosa (AD. & RvE).. Evenaria (Cupinota) japonica (ScHILDER) Cerato8tOma jTournieri (CROSSE).... DuNEER a. (06enebra) 3'aponiea Nucella freycincti (DESHAYES) Purpura bro飽ni DtJNKER Pyrene (Mitrella)甘arians (DuNKER) P. (Sundamitrella) i隅POlita (Sow.)‥. P. tylerae (GR. & PID.)‥‥‥..‥=..‥‥ Pi8ania (Japeutkria) ferrea (REEVE).. Cantharus (Pollia) undulatus (ScⅡEPMAN) Olivella GouLD‥‥…‥‥‥‥‥‥ spreta LA故..‖‥‥..‥.‥...‥ Oliva軌uSlelintb Terebra bifron8 HINDS (Pervicaci.a) Siphonar甘α 3'apo%Wa (DoNOVAN). S. sirius PILSBRY LISCHKE Mytilus erassitesta M･edulisL･･･:･･･････････････････ Adula calijTornwnsis (PIIIL.) Lithophaga (Leioolenus) eurta (LIS.) Chlamy8 8Wifui (BER.) KtJRO王)A C. nippo雅e%Sis ‥. ‥.. …. ‥.... ‥‥. ‥. ‥.. ‥. ….. ‥. ‥... ‥... ‥. ‥.. ‥. ‥. ‥... ‥. ‥. ‥. ‥.... ‥.. ‥. ‥.. ‥.. ‥. ‥.. ‥. -. ･. ･. ･. ,.. ‥.. …. ….. ‥. ….. …. ‥... ‥.. ･. -. ‥. k∼ eg くづ. .g;. ;. 遷曇副書 ,上d (匂. a. コ己. ト. 39o. r. 35. r. 39 25?-. 40. 31. 37. 31 22. -. ■･-1. 23-41 23 12. … ･-. 35 026. -. r. C r. 34. m m. -35. 31. -41. 39. r. m. m. 51 49 26. r. 39. r. r C. C. C. C. C C. C r r. -42 -41. 0 -42 3338. C. 26-. r. 2333-35 33-51 36 -46 25-41 0-41. C r. 43-45 31 -36 38 -51 26. r. C. -41. 0. ‥.. ‖‥‥..‥..‥‥.. ; .. ■▼￣ヽ. C. 31 14-. 26. ….. d. 3. 35 35. m. 孤. m. m. m. m. m. r. r. C C C C. C. 0. C. C C C. C r. -. 31 -42 34-51. 35-49 26-35 38-51 31 -42. r. C. m. 33-36. -35 30-35 35 33 31 -39 ll 35 31 -35 0-35 26 -41. C. m. r. r 孤 r. C. C. C. m. m. r r r C.

(7) On. Some. Noteworthy. Shells. from. Pe6ten (Notovola) albicans (ScHROTER) Spondylus LISCE正E... crue叩tuS Ostrea (Crassostrea) gigas THtTNBERG 0. (Ostrea) denselamellosa LISCHEE Phlyctiderma PII.SBRY japonica GRAY lamarcki .Meretrix Proioihaca 3'edoen8i8 (LISCHLE) P･ schrencki NoMURA ---:･･ Venerupi8 (Amygdale) 3'aponwa (DESE.) Petricoliru8 (Sow.) aequi8triatus ‥. ‥. 30. ‥. *. KuRODA. After. He. Acanthochiton. Check. List, and distributi()n. C. C. 39. r r C. C r. C C. 51. -. C C. 39. -. r C. -39 -42 r. List.. chart. the. of. Oyashio. the. where. by. from. curve. another N. mentioned. above indicated. radula. deduced 35-36o. region. C. r. 39-43. he. at the. C. C. -45 -39. 23 31 31. Noioacmaea. and. -39. C. C. 35-42. Check. moreover. 31. 39. ‥. distribution. the. compiled. ‥.. HABE's. &. beside. the. ‥. r. m. 31 -41 36-43 12-35. ‥. ‥. ‥. -34. 25 32. _Mactra Spi8ula. ‥. 25 32-. REEVE sul6ataria sachalinesis (ScⅡRENCK) (DuNEER) FChion semiglanosum KIRA Nuttalia solida KIRA.... Eeteromacoma oyamai Tellina iridella MARTENS DtJNKER Siliqua pulchella Aloides venu8ta (GotJLD). inornala Barnea (PILSBRY) ‥. 35. r. -42. -39 23-43 23-39 33-39. ‥. ‥. Prefecture.. 26. ‥. ‥. ‥.... Chiba. offCh6shi,. KtJRODA the. and. 63. species. &. HABE's of. adjustment. ･Kuroshio. currents. (Texト丘g. 1).. ーmeet. J押･ So. 7q. l. 占￠. l I. ノ So. 7o. lo. /○. /oo. Text一丘g. Full. a. the 62 species,. elements. are. intermediate. The. Distribution. line. sbo☆s. Of. 1.. assemblage. about ones,. & by. made. except. ll,. of. chart. KロRODA. after curve. 30.. .之0'. while the. of Kawaguchi. those of the ･different from is the estuary characterized. of. of. lnub6.. Cape broken. and distribution.. true. line. CβJJα〝αわγβ〟∽α, clearly northern ones are 31, the are southern others fauna are composed of mixed elements.. the. near. by. adjustment. cleary littoral. other. marine shells Check List. I(i. distributed. widely. hence. the. HABE;'s. the. so.. *o.. of the Inub6;. of Cape occurrence dominant. sites. the. estuary. River the. To-ne brackish. of Osirea.. is. little. a. fauna. of.

(8) T.. 36. SHIKAMA. Description. of. species. selected. Gastropoda Family. FISStJRELIDAE LAMARCK,. Emarginula Conch.. Syst.. Type:. 1801. 2,75.. Emarginula. LAM.. conica. 1953. HABE,. fujitai. Emarginula. (コウシスソキレガイ) (Pl. 1, 1929. texト丘g.. Emarginula. 1953. Emarginula. As highly. posterior. tures. ribs, and. many. Seto. Ibid., p. Mar.. specimens. Yokohama. National. of Ch6shi. fully. white. concentric. by. radial. length. radial. Lengtb. FuJITA. species.. After. shape. and. slope;. the. giving. of aperture ‥‥‥‥-----･25･5 of ditto‥‥‥‥‥‥‥‥.‥‥.‥‥18.7. KuRODA. described. they. identified. Prefecture, thy. in. him,. fujitai has There. is. the. specimens. species. to. this. original. distinctions,. some. recognized. foveolata.. sculpradial. foveolate. more. shell and. conical degree. some. HABE. and. individual. of. be. 20･0. 19･3mm. 14.0. 13.8. 13･2. 13･7. from. Tateyama. foueolata. took. this. narrower. variation. to. ScEEPMAⅣ be. anterior in. the. of shell.. Emarginula. kashimaensis. sp.. nov･. (カシマスソキレ,新称) (Pl. 1, Figs. IIolotype:. convex-. accessory. with. ribs,. is. 25mm･. surface.. although. than. to. slope. of anterior. alternating. intercrossing. ribs. common･. attaining. anterior. sc111ptured;. ribs. 200f;. about. Shell is large,. one･sixtb. in. Stored. (GIYU)･ Daito,. off Cape. deeply. and. main. widtb. Chiba. 33,. 1, p･. no.. ⅢIRANO,. Height‥‥‥…‥‥‥‥‥……‥‥--17･2. Bay,. 3,. vol.. by. collected. BABE,. short,. 42. above. Measure皿ent.. when. 10,. 3,fiig1. pl.. 93.. Lab.,. Biol.. University. and. described. conical,. of. of the. aspect. Three. concave;丘ssure. consist. 88,. p.. 33.. Southeast. Remarks;. and. 32,. Institute,. in length,. 1,. Venus. KuRODA: Pub.. HABE:. fujitai. described:. Locality:. FuJITA:. jToveolata ScHEPMAN,. ll,丘gs.. specimens. Geological. 4-6). 1.. 1929. pl.. SCEEPMAN,. foveolata. Emarginula. Figs.. A. large. ､specimen. collected. 8. a,. by. b) HIRANO,. Stored. ,in G上YU･. a. new. slope. lateral.

(9) on. some. About. I.ocality: Remarks:. light. thin,. rather. little below. a. anterior. the. slope. narrow. -narrow;鮎sure. -radial ribs -ribs. Length This much. is. rather. summit. with. and. obsolete. not in. width is. but. ditto. of. to. nearer. book,. of. the. 21mm. and. by. lower. posterior. situated ;. fasciole. anteior. slope･. aspect;. main. and. accessory. height. 12･5mm･. of main. shell. is. which by. and. margin,. ;. margln. anal. in foveolate. alternating. length. of. concave;. strong. conical,. posterior. length. distinguished. situated. surface. so. 50%. small. near. nearly. one丘fth. obsolete. 30mm,. fujitai. like. conical,. delicate. and. a. lies. posterior. depressed. about. to. summit. rare･. length,. reduced. fujiiai, but. f;. height. colour,. below. short,. of. of aperture. species. whorl. and. and. 70. above. apical. convex. like those. are. ,sculptures. in. posteriorly;. slユmmit. slightly. white. one. in. 30mm. to. 37. Prefecture･. 250. Ch6shi,. of. attaining. yellowish. Chiba. off Ch8shi,. southeast. large,. in outline;. oval. :aperture. 72 miles. Shell. from. shells. noteworthy. so. more. sculptures.. Emarglnula. nov.. sp.. amyda. (スッポンスソキレ,新称) (Pl. 1, Ⅱolotype. Localily Remarks. whorl. posterior. attaining. height. below to near. This lies not. species so. near. is. is like. rather. allied. 20mm. to. Type:. 3,. height. in. the. summit convex. slightly. lamellae, third. one. length. mentioned. species. ribs above. 60･. but. Length. lOmm･. but. shell. HARE,. 1961. is. lower,. summit. latter.. LowE,. 1827. 77.. p.. Patella. radial. kashimaensis,. aS. margln. above. the. transverse. below. and. main. and. slope. conical, in outline;. suboval. many. of the. ribs;. depressed. little below. a. anterior. narrow. GIYU.. rare.. aperture. lies. with. that. of radial. of ditto. Jour.,. length,. in. margin;. Puncturella Zool.. 28mm. short,. width. posterior. 250 f;. naroow,. analfasciole. in. Stored. of Ch6shi,. hook,. small. straight;丘ssurre. 28mm,. c). of length;. posterior. Sculupture slope. .of anterior in arrangement more irregular のf aperture. to. 50%. a. b,. ⅢIRANO,. southeast. large,. straight; almost. are. -which. miles. lying. by. collected. reduced. summits. ･posteriorly;. shell 72. shell. coloured;. aPical. ぐand. dead. About. : :. -thin, grey One. A. ;. 7a,. Figs.. noachina. Puncturella. L.. regia. SHIKAMA. &. (オオコウダカスカシガイ) (Pl. 1,Figs. 1934. 1961. Puncturella Puneturella. gigantea. ScHEPMAN,. (Rimulanax). regia. 1a,. b, 2a,. b,. HIRASE: SHIKAM:A. c) Coll･. &. HABE:. Jap･ HABE. Shells, Col･. pl1 62,fig･ I11･ Shell. 7･. Jap･.

(10) 38. (ll), pp･. 112,. Separated 1908. S王ⅠIEA班A. ScEEPMAN:. Siboga. 20.. 2,軸.. pI.. from. Puncturella. Specimens. T,. gigantea. described:. Three. Expedリ49. adtllt specimens. a,. pl･ 7,丘g.. p･ノ88,. by. collected. I七RANO,. 4.. Stored.I. in GIYU. Locality:. About. I)eBCription: aperture. oval;. just behind anterior. fusiform, fissure from. to. anterior. slope. straight. whorl;. unequally and. on. Remarku. This. of gigantea higher. shell,. fasciole･ the. from. Okinose,. inter-septum. shorter. HIRASE's. longer. and by. specimen. pearly. Punciurella. by. ribs. starting:. primary. ribs;. from. lower. is･ end. posterior. hirasei. P･. etc･. different. a. OTtJEA,. the. under. is distinguished. but. convex. and. is. S. HIRASE. Bay,. la,rger size. ts･ TAXI,. of. interseptum. white; runs. end. of. callus.. Sagami. by. between. groove. obsolete. anterior-,. shorter. shell. is firstly illustrated. species. ScⅡEPA4EN. of many. elongate-. lower. fine radial. on. apex. lamellae;丘sstlre running. is, lying･. whorl. near. from. and_. which. apical. lies very. intercalated. of. very. small. fasciole. narrow. conical. posterior. very. of ribs. ribs. thin,. white,. transverse. interior. eac血side. mm,. a. consists. by. rare.. shorter也am. pair. secondary. downward;. extends. a. with. crenulated;. bordered. and. has. sculupture. margin;. 41×32. to. downward;. and. lies high. 200f;. anteriorward;. is turned. narrow. short,. of apical. 丘ssure,. bent. apex. of shell. shell. end. distinct. to. attaining. 7×1･5mm,. margin. by. large･. apex. slope,. of Ch6shi,. easet. Shell. hence. convex,. slightly. 72mi1es. name. from. sborterⅥ. slopes,. hirasei. it. OTUKA,given. species. 1935. (オオツカコウダカスカシガイ,新称) (Pl･ 1, 1935. Puncturella. 1949. Puncturella. 1951. Puncturella ll,丘gs.. Specimens HIRANO. in 1959,. hira8ei. oTtJKA,. =ABE‥. in with. by. its. is. 13,. Jap.. ､ Ill･ Cat･. 847,. p･. pl. 53,fig.22a-c.. 15, p. 87.. Jour, Mal.,. Jap･. specimens. adult. 200f;. rare.. moderate. sized,. yellowish. slope. straight. lies. near. ScHEP血AN;. gzgantea. species. Inst･,. HABE:. &. Shells,. 17,. no.. 117,. p.. pl... to. three. clearl,y. smaller. by. collected. WATANABE. &_. GIYU.. fasciole. one. Eartq･. Bull･. Two. :. in. anterior. downward;. alternating. ScHEP班EN. KIRA. b). a,. of Ch6shi,. Shell. as. This. hirasei. OTUEA,. 3. 30.. East. 26× 18･5 mm;. narrow. OTUKA:. stored. Remarks:. turned. hirasei. described. Locality:. to. 29,. Figs.. size,. and. apex. on. anterior consists. sculupture. secondary. than. shorter. ribs. distingtlished more. white,. between. straight. from. regia. posterior. thick,. attaining:. conical,. posterior;. slope,. apical. short many. of. whorl. but. not. radial. sol. ribs,,. them. nov･. sp.. slope,. and. relatively. gigantea, larger.

(11) on. some. broader. and. fissure,. on. species. this. illustrated. TAKI. be. to. nearest in. the. convenience. London. Med.. Type:. Diodora. OTUEA's. this. treats. them. Diodora. GRAY,. 1881. the HIRASE's in. the. second HABE's. uncorrect,. OTtIEA's. and. ribs. radial. as. this. original thinner. and. conspeci丘c･. 15, p. 233.. Reposit.,. L.. gracea. Diodora. be. may. weaker. writer. described. opinion. specimen,. having. 39. included. and. judgments. these. little different. a. Noto. f･o11owed. Prefecture･. OTUKAfirstly. ribs･. radial. but. may. is. for. but. shell,. ls･. Chiba. off Ch6shi,. of Shimazaki,. Handbook,. specimen. fossil specimen. stronger. Himibed. species･. of HIRASE's. edition. from. shells. by. and. fossil from. a. in. glgantea. noteworthy. OTUKA,. yokoyamai. 1937. (ヨコヤマクズヤガイ) (Pl. 1, 1937. Diodora. yokoya仇ai. 30,丘gs.. 4. described:. Remarks:. "Shell. anterior. about face. anterior more. main. concave. ribs. radial. more. long. so. not. prefecture. of main. they. radial. the. from. The. Che.shi. white. specimen. city. and. resemble. 943,. p･. pl･. GIYU･. OTUKA's. hole. The. which radial. by. from. each. other. but. ribs. is not. Radial. to gain. a. in so. Motoyasbiki. the. to. (fossil). the Koshiba. the as. alternation. in the. former･. koshiben8is Fukuoka. 35. 26. 22. 22±. 19.5. 12±. 14. (:weei:dg:h::. the. compare. of Motoyashiki･. latter. distinct. flat,. Wakayama. from. formation. Miyata. shell. more. of light violet. patches. able. was. is. ribs. living. is smaller,. of koshibensis writer. with it. which. Shionomisaki,. from. sur-. unrugosed,. ribs,. able. situated. Anterior. diagposisI. as. with. concentric. and. apical. radial. that. radial. accessory. radial. city,. of yokoyamai. original. in. stored. colollred,. writer. Fukuoka. surface. 1959,. grey. after. lmazyuku,. Yokohama. and. thin,. OTUKA. Ch6sbi. ･easur-ents. 529,. no･. (original designation).. accessory. the specimen. generally ribs. 44,. vol1. convex;. slightly. holotype.. yokoyamai;. from. in. thin. with. koshibensis. of Koshiba,. city･,. Jap･,. witb丘ne. ”. holotype;. the. the YoKOYAMA's. and. shell of yokoyamai Miura. in. gained. color.ーOTUEA. formation. than. as. HIRANO. length. of shell. OTUEA. by. posterior. third. tba血in. numerous. Soc･. ornamented. concave,. from. of koshibensis and. conical,. alternating. distinguishable. Jour･ Geol･. Collected. surface one. b). a,. b.. a,. specimen. ribs;. OTtJKA:. 9. Figs.. 9. from mm.

(12) 40. T.. SEIKAMA. Family. TROCEIDAE. Lischkeia In KIENER. &. Type:. FISCHER;. FISCHER,. Spec.. 1879. Iconog.. Trochus. monilifera. Lischkeia. conuexiuscula. Coq.. Trochus,. p.. 419,. LAMARCE tosana. nov.. subsp.. (フクレギソニビス) (Pl. 1954. Bembix. 1959. Bembix. convexiusculum convexiusculum. Compared 1 920. 1954. Turricula. An. I)escribed. specimen. in. 75. Ill. Shells. Jap.,. p.. 142,fig.. Coll.. Ill. Shells. Jap.,. p.. 12,fig.. Coll. S°i. Imp.. Jour.. Univ.. Tokyo,. vol.. 32. TAKI. from. &. A. Pal.. OyAn4A:. off Tosa,. Chashi:. large,. specimen. of Cb∂shi,. 150-200f;. Pap.,. Soc.. 2,. no.. GIYU.. in. stored. young. broadly. whorls. 617 subnodosed many. with. by. collected. HIRANO,. nodules. without. subsutural. distinctly. whorls. Aperture. Holotype. Periphery. nodosed,. In convexiusculum. node.. band.. pearly white with like in argenteonitens. convex. 5 in conuexiusculum.. while. three. common.. not. thin,. base. slightly round;. spiral threads,. smooth in. high,. conical,. subgranules;丘rst. very. whorls. east. miles. post-nuclear. With. obsolete. Coll.. YoKOYAMA,. from. Shell. lustre ; nine. other. KIRA: KIRA:. specimen. adult. About. Remarks:. acute. YoK., YoK.,. b). GIYU.. Loeality:. LISCⅡKE. b, 13a,. 5,丘g.. conv8Xiu8Cula 32.. 6,丘g.. Holotype:. stored. 12a,. YoEOYAn4A:. convexiusculum 6, p. 90, pl.. art.. pl.. Figs.. with. Bembix 39,. 1,. there. subrbombic.. while也e is. seen. many. ･ Kii. Tosa. Ch6sbi. {. Measurements. YoEOYAn4A's this species. land north. Kii,. 53. 51. 50. 34. 43. 49. 44. 35mm. Diameter. 43. 37. 42. 24. 35. 43. 38. 27. from. species. by its smaller. of base.. threads. Heigbt. This. associated. of Sagami. Group. shell, subnodosed type. with. Bay,. the Miura. is rather. LISCHKE,. herefirstly. Type:. Mal.,. p.. Trochus. 218,. SwAINSON,. p.. 351.. conulus. L.. Calliostoma. I(Akoya). off Ch6shi.. tKEBE,. 1942>. (アコヤエビス) (Pl. 1, Figs.. 14a,. b, 15. a,. b, 16a,. b). from. smaller. spiral off Tosa. waters. exceedingly. 1840. akoya. and. Kuroshio. but from. reported. Calliosioma Treat.. in the. common. distinguished. band,. subsutural. argenteonitens. and. of Kamakura. rare. from.

(13) on. from. shells. noteworthy. some. Jap. Shells,. 1934. Calliostoma. sp.. EIRASE:. Coil.. 1942. Calliostoma. (Calotropis?). akoya. Chiba. offCh6shi,. IEEBE:. 41. Prefecture･. 8･ pl･ 69,fig･ Jap･ Jour･ Geol･. Geogr･,. 18,. vol･. no･. 4,p.257. 1954. Callio8tOma. In. Ⅱolotype:. specimerLS in. stored. About. L.;. ･conulus. and. distinct. haliacus. HARE;. umbilicus. many. spiral. cords. and. translucent,. This. shell. and. 69,fig･. pl･. 8･. war･. in. HIRANO. 1954･. 20. 18. from. numerous. Eccliseogyra less. and. horny,. 16. 23. 16. 25. circular by. DALIJ. few. with. haliacus. GMELIN. Or. has. in. or. conulus. by. columella upper. tosaensis. renection･. half. of. interspaces. 19. 20mm. 19. 20. 21. off Okinose,. which cords. of. inside;. operculum. striae･. concentric. 18. in. baseflatly. acute;. iridescent. from. large. Sagami. Bay. (500. last whorl basalward. prolonged. ;. carinae. distinct.. multispiral･. Distinct. spiral. and. seven. nov･. and and. lustre,. whorl;. and. outline. pearly. offChe･shi･. gen.. suture. in. as. common･. not. whorl. degree,. beautifully. 18. in. covered. penultimate. 20. from. flat. so. not. moderate. and. broad-conical. is separated. by. on. circular. firstly reported. small,. thread .axial operculum -from. by. as. last. of. partly. in. Hazuregyra. which. alive. with. straight. originally described. is. species. but. of. 20. Diameter. rare. here. and. last. 200f;. white. periphery. cords. Ⅲeigbt Measurements. so. opened,. subrbombic. aperture. yellow,. about. thin,. not. in conulu?. or. of Ch6shi,. conical,. little round,. suture. subgranulated;. i),. Shells,. the. in. collected. southeast. broadly a. with. unequal;. miles. whorls. like in. surface. 72. Shell. post-nuclear. thin,. specimens. Jap･. GIYU.. Remarks:. KtIRODA. Coll･. destroyed. COllection,. Seven. described:. Locality:. couvex. HIRASE. the. HIRASE's. TAEI:. IKEBE,. akoya. and. carinated. lower. whorls. of them･. separation. Hazuregyra. sp･. u)atanabei. nov･. (-ズレシダタミ,新称) (pl. 1, Figs. Type:. ーWATANABE, Locality: √audimaculatus. Two. 22a,. in. Precisely :. rare.. c,. d,. 23a,. b) Eazuregyra. specimens. Stored. b,. colleted. by. ⅢIRANO. and. gen,. watanabei &. sp.. nov.. GIYU. unknown,. 200-250. f; gained. from. stomach. of. Lycodes.

(14) 42. SEIKAA(A. T.. Remarks:. Shell. lustre, in the. covered. thin. holotype. large･. by. erosion;. separated distinct. two. apical. from. spiral. surface. over. axial. with. three. periostracum. suture. ;. and. base. round. of. multispiral. operculum. in. as. very. circuhr,. Width Length. This Sagami. species. but. be. may. threads. axial. and. of curious. and. whorl. is rather. coiling. smaller. ‥‥‥‥.‥.‥‥. of aperture. width. distinguished. much. Type. Scald. :. EPiionium. Eur･. carinae. don上. obsolete,. ; aperture. on. subcircular large,. yellow. 7.0. 6.Omm. 7.2. 6.0. 4.0×3.0. 4.0×3.0. Eccliseogyra. to. related. its lower. apex,. from. more. off. numerous. size.. EpITONIIDAE. Boreoscala Scbal･. ‥‥‥. it by. from. Family. Iconog･. numerous;. trochid.. last. of. relatively. spiral. relatively. Length‥.‖‥….…‥‥‥.‥‥‥.‥ Measurements. which. striations. small. detached. threads a. and. spiral. ; protoconcb. carinae;. of. axial. of whorl. numerous. suture;. last. whorls,. pearly･. with. is largely. which. basalward;. prolonged on. silver･white. colour. fout. of. running. shoulder. projections. coloured,. and. it below. carinae. of straw. consists. carinae. of. fragile, broad-conical,. thin,. small,. by. KoBELT,. 1902. Meersconch.,. CIIEMNITZ. groenlandica. (Boreoscala). 3, p. 23. jaPonicum. groenlandicum. subsp.. nov.. (チビ-ゾイトカケ,新称) (Pl･ 1, Type:. Two. Locality:. specimens. East. Remarks: constists. recurved basal. Shell. length and. cord,. do. suture. smooth;. of. covering. deep;. Measurements. aperture. di鮎rent by. species. is. fro血it. by. less whorls･. The. in 1959,. GIYU.. rare.. gr･eyish. cords. strong,. 6. acute,. short. less. beside. a. 21.Omm. 10.0. 9.5. rather. like the. its smaller. form. of. of aperture. typical. size,. lack. crebricostaium. form. 6.0×4.0. ‥‥‥. of. of spiral SARS. 6.0×4.0. but. groenlandicum cords and. and. curved.. 24.8. width. strong. cord且at. Width‥‥…‥‥‥‥‥‥.‥‥.…‥ and. than. last whorl,. on. below也e and. unlustred;. whorl. like, 12. surface. pillar. chalky,. last. eroded,. basal. subcircular;. to. white. strong'ridge. costae;. in. stored. Length............................... Length. This. spiral. axial. 18). protoconch costae. axial. over. ⅢIRANO. conical,. whorls;. sutures;. run. not. thick,. shell;. b,. a,. of Ch6shi;. southeast. six. 17. by. collected. small,. than. more. of. third. one. to. Figs.. below. basal. norvegicum. may. cord CLENCH. be and &.

(15) on. TロRNER. by. and. from. and. 1, Fig.. T.. The. KINO紺ITA. and. It is larger. 19).. than. from. aspect. species. of. gained. from. is. ITO. Who. it to the. 32･7mm. measures. and. by. Prefecture. submitted. from. reported. (Pl･. writer. long,. o圧. CIIIBA,. R･. but. has. species･. Nysiiella γol. 2,. CLENCH. &. DALL. oPalium. Nystiella. 1950. TmNER,. 337. 29, p.. no.. EPiionium. Type:. K.. spiral. numerous. costae･. axial. off lwate. 43. Prefecture･. groenlandicum. this species. this. Jobnsonia,. by. Sea). (Japan. Chiba. numerous. and. slender. size･. off Tajimi. distinct. no. larger. by. Hokkaido. its. by. off Ch6shi,. from. shells. noteworthy. distinct. are. cords. some. hiranoi. nov･. sp･. (ヒラノイトカケ,新称) (pl. 1, Ⅱolotype I.ocality. in. irre即1ar not. over. base. costae;. becomes. greyish deep. 1959,. stored. white,. with. in GIYU･. with. in. 22. about. of last whorl. last. whorl･. a. with. eight band:. subsutural. sometimes. angular. than. more. distinct. numerous,. striae. over. in. common･. thick,. weak,. band. sllbsutural. f;. suture. spiral. arrangement;. axial. which. costae. ⅢIRANO. turreted,. eroded;. axial. round･,. by. b). b, 22a,. a,. 250-260. thin,. small,. surface. whorls;. shoulder. of Cb6sbi,. shell. ;. 21. collected. specimen. East. :. Remarks round. A. :. Figs.. particulary do. crenulated･. distinct. spiral thread. suture. Holotype 24･8. Lengtb…‥‥‥‥‥‥‥‥‥‥---･. Measurements. i. width Length. This North. America,. turreted from. species. as. in. this species. and. shell. oPalina. N. by. their. is larger,. smaller. Type:. 2,. Murex. p.. N･. Or. more. eminent. G班ELIN. Figs.. 4. subsp.. a,. b). deep. DALL. (ヒラノイトマキツムバイ,新称) (Pl. 2,. 6.0×4.8. cania. 1798. hiranoi. 6･2×4･0. costae. 117. calameus. 8.4. axial. BuccINIDAE BoLTEN,. 8.3. from. DALL. more. with. shell and. islandicus. Colus. ･--. opalina. DALL. concava. Colus Bolten,. of aperture. width. Family. Mus.. ‥‥‥‥‥‥‥‥. like Nysiiella. is rather. but. vborl. oflast. 24.Omm. nov.. sea. and are. broader. of Atlantic not. so. much. distingtlished axial costae･.

(16) 44. T.. Compared 1907. SHIKAMA. with. Tritonofusus. Smith･. DALL:. calameus. Inst.. Mis.. bull.,. Coll.,. 112,. p.. 10,. pl.. 丘g.5.. Colus. 1927. DALL, calameus 4. 7,fig. pl.. p. 213,. Ⅱolotype:. An. Remarks:. Shell. having. and Whorls. about. thickness,. twisted. white,. lip thin,. slightly length. 19mm, This. broader. and. thicker. similar. than. shell. eroded. by. separated. by. many. minute. moderate. canal. wide. short;. outer. last. whorl. known. DALL. and. width. of. in. the Okhotsk. shell, ￣1essspiral ridges,. the ridge. calameus. from. from. reported. little smaller. a. etc. ; in. is. apex. columella. preserved,. calameus. it by. from. interspaces. equal. A. 12.. to. related. is distinct. but. periostrac□m. 25×9mm.. of aperture. width. 1,. pt.. GIYU.. ridges,. crossed. 2,. 7;. anteriorly; as. in. Stored. spiral. are. whorl. 45mm. Sci., vol.. distinct;. rounded.. which. recurved Height. is closely. species. of 682f,. and. Geol.. straw-yellow. suture. penultimate. of. re且ected. and. slightly. interspaces. Pub.. a. with. whorls;. equal,. ridges. Univ.. by ●HIRANO,. covered. well-rounded. low,. spiral. Stanf.. collected. white,. channeled. lines;. growth. is. six. equally. specimen. thin,. withflattish,. broader,. Sea. adult. OLDROYD:. off Tosa. but. of penultimate whorl it is more slender and. this species.. DALL,. Ancistrolepis Proc.. U.S.. Type:. Nat.. Mus.,. Chrysodomus. 1894. γol. 17, p. 709 DALL. eucosmius. hiranoi. Ancistrolepis. nov.. sp.. (ヒラノバイ,新称) (Pl. 2, Ⅱolotype Locality. by. threads shell.. :. as. and minute. numerotlS. large,. relatively. 44.5. with mm,. A. and. uneven. length. thin,. and. whorl keel. radial. width,丘ve. at. lines. growth. width. round. thin outer canal. of aperture. than. do. and. and. 39.5×22.7. color, one. without half narrower. ten. not. cross. keels;. Operculum. axial. length. of than. sculpture aperture in length,. moderate. Length. and. at last whorls;. keels.; axial. broad. mm.. white. and. lip; pillar straight,. short. in GIYU.. whorls,. distinct,且at,. pernultimate-. which. six. of olive less. interspaces. on. running. Stored. rare.. last. eroded;. fasciole;. EIRANO,. periostracum. KuRODA;. in. with. by. with. apex. suboval,. b). a,. very. turreted,. velvety. striations. distinct. 200-250f;. fujiiai. numerous. except. absent. large, thin. in. Protoconch. interspaces. white. Shell. 1. collected. Ch6shi,. of. conspicuous seen. specimen. adult. East. :. Remarks covered. An. :. Figs.. 84mm,. width. unpreserved..

(17) on. This is. keels. at. like. from. it by. of penultimate. last whorl, in. thicker. and. penultimate-. by. fifteen. about. stracum.. This. kinoshitai. of Kuroshio. be. may. species. in且ated last. at. Nat.. Samml.. Type:. Nassaria. 6,. specimens. 2,. whorl. deep. and. 3, p.. distinct. 123.. Sci･. Tokyo. TAKI. &. lmp･. Univ･,. vol･. 39,. YoI∈･,. OyAMA:. Soc･. Pall. Jap･. 13･. by. collected. specimens. the. 1954,. in. writer. rare･. large,. turreted, half. lower. and. shoulder. inflated,. low,. half. about. round. and. axial. short. Measurements. oflast. Length. yoKOYAMAfirstly the. generic. described name. is distinguished last. and. whorl.. whorl. it. from. of SiPho and from. lischkei. seen. suture. except. in last. 12. -----. bed. Naganuma. compared MAKIYAM.A. arcuate. deep･. and. aperture. inter-. equal. tolerably. and. moderate. tint;. shell;. almost. .‥‥‥‥‥‥‥‥.‥. of. width. the. ribs. Lengtb‥‥‥‥……‥‥‥-----･width. light brown. of. by. round. six. with. with. separated. with. canal. white,. length. obsolete. subrhomboidal straight;. greyish. last whorl. of. unangulated;. wide, nearly. 20f;. fusiform,. ridge且attish,. lip; pillar. unnodosed. and. b). 8a,. Coll･. Jour･. obesijTormis. Two. shoulder. aperture. species. of periotype. 1807. b,. Figs17a,. 3,fig･. pl.. small,. relatively. spiral. under. threads. 13･. of Ch6shi,. Shell. upper. body. outer. 2,. no.. East. Remarks:. spaces;. 2,負g.. pl.. described:. Locality:. whorl;. (six. GIYU.. in. whorls;. species. keels. Oyashio. of. of. obesiformis YoKOYAM:A (ムサシノヒメニシ). (Microfusus). Pap.,. Spec.. stored. 52,. p.. fujitai. Rostock,. YoKOYAMA:. obesiformi8. Na8Saria. and. this. radial. by axial. base. of. (GMELIN). nivea. (Pl･. art.. keels. more. more. whorls,. near. whorls,. whorls). LINK,. Univ.. Nassaria. 1954. in且ated. come. but. outline. type.. Bescbr.. Sipho. general. more. may. between. situated. Nassaria. 1920. fujitai. more. in. KuRODA shell,. 45. Prefecture･. kinoshitai),fewer. in. A.. etc.. distinct. is. kinoshitai. (four. its. Chiba. offCh6shi,. its thinner. whorl,. periostracum. but. thickness. A･. much. distinbuisbed. from. shells. noteworthy. is very. species. clearly. radial. some. it. with Or. of. 15mm. 8. 8. 7×4. 7×3･8. early. Pleistocene. Sipho obesus･ Sow･. aCutisPiratus. Sow･. This by. its.

(18) 46. T.. SEIKAMA. Buccinum Syst.. Nat.. Type:. 10;. edit.. Buccinum. L., 1758. 734.. p.. L.. undatum. Buccinum. schantaricum. choshiensis. nov.. subsp.. (チョウシバイ,新称) 2,. (Pl. Compared 1851. 1907. 233,. p.. p.. pl. 20,丘g. VERII･. 4,. 19,丘g.. pl.. Buccinum. Sib. Reise,. MIDDENDORF:. schanlaricum PILSBRY:. VERIIRtizEN,. middendorBi. 245,. var.. undatum 4-6.. 10,丘gs.. pl.. Buccinum. 1908. b). a,. with. Tritoniu仇(Buccinum) 2,. 5. Figs.. Proc.. Acad.. Lsci. Phil.,. Nat.. 4.. HIRASE:. Var･. middendoribl. Conch.. Mag.. (Jap.), γol.. 2, pl.. 27,丘g.45. 1935. Buccinum. "schantaricum. MIDDENDORF〃,. KuRODA:. 1959. Buccinum. ``schantaricum. MIDDE:NDOLF'',. KIRA:. Eolotype Locality. Shell. :. lacking. numerous. delicate,. narrow且attened. ribs. weak,. suboval. aperture. B. larger,. Height 22× ll. with. btit. last. of. whorls,. not. subequal. canal. width. in GIYU.. Stored. seven. with. distinct. most. and. 35mm,. cbanneled;. and. deep,. wide, whorl. sixth. sculupture. of radial. aperture. whorls;. recurved. 21mm,. bn任. interspaces;. channeled. in丘fth. light. a. of. a. with. length. strong. andノWidth. of. mm.. MIDDENDORF. schantaricum thicker. stouter,. ridges. wavy. lip undeveloped;. outer. and. fasciole.. few,. a. not. thin, distinct. suture. epidermis;. ⅢIRANO,. rare.. ;. unknown. small,. by. collected. specimen. Precisely. :. Remarks colour,. Inmature. :. vol. 5, p. 153. Ill. Shells Jap., p. 59,. 6.. 27,点g.. pl.. Venus, Coll.. from. darker. and. Kushiro. in color. is very. Buccinum. than. to. similar. this,. but. Stored. in. this form.. sp.. (チゴバイ,新称) (Pl. Specinen. described:. Figs.. 2,. 6. a,. b). An. adult. specimen. collected. 30 miles. north. northeast. of Choshi,. by. HIRANO,. GIYU. Locality:. mine); round,. less. medial. keels;. ones. (offHidachi. 250-260f. rare.. very. Remarks:. the. About. Shell shouldered straw. mentioned. small,. in. except. colored above,. suture. ･elongated;. third,. with. brown. having. many. deep;. fourth patches; feeble. seven. and. post. nuclear. fifth whorls. sculuptures radial. are. whorls. which. carry. like those. striations.. Aperture. of.

(19) On. suboval. some. an. with. from. shells. of last whorl. width. Chiba. offCh6shi,. lip; canal. outer. expanded. 31mm,. fleight. noteworthy. deep. wide,. 16mm,. length. Prefecture.. with. and. a. 47. fasciole.. moderate. width. 16×. aperture. of. 9mm.. Family. CANCELLARIIDAE. Admete Naturb.. Tidskr.,. Type:. Admete. 4. KROYER,. 1842. 88.. (1), p.. FABRICIUS. viridula Admete. nov.. sp.. u)atanabei. (ヒメウスカt7-ゾゴロモ,新称) 2,. (Pl, Holotype Locality. shell;. pillar. straight,. short,. width. of last. 18mm,. This. its. more. and. no. sharp. 12mm,. two. plait; canal and. and. but may. Var.. of. the. whole. semilunate; Length. short. llx5mm.. of aperture. width. SMITH. globularis. shallow. length. sculuptures. over. wide,. rare.. 】rounded. third. spiral. aperture. f;. well. interspaces. arcuate;. length. like A.. witb丘ve. occupying. flattish. 100. above. axial sculuptures;. gently a. ∇bite,. GIYU.. in. stored. of Cb6sbi,. east. wider. sharp,. whorl. writer,. inflated. with. b). greyish. eroded;. thin, with. is rather. species. it by. apex. lip thin,. outer. the. ovate,. large,. grooves. a,. probably. thin,. and. shallow. surfaces',. unknown,. relatively. 12. by. collecte. small,. protoconcb. numerous. from. Shell. :. last whorl. whorls;. of. specimen. Precisely. :. Remarks. the. A. :. Figs.. be distinguished. grooves.. obsolete. Admete. nov.. sp.. choshiensis. (チョウシゴロモ,新称) (Pl. 2, Types:. Specimens. IJOCality: Remarks: thin. and. and. Shell. length. apex. penultimateor. and at. absent. short, to. be. with absent.. two. with. straw. colored. of shell;. suture. deep. whorls nine. axial. suboval, weak. with. plaits;. and. strong. with. at last whorls;. shoulder;. large,. ･aperture. turreted,. canal. not. four. gently very. the writer,. whorls, last. periostracum;. shoulder radial. much. keels. curved short. of thin and. white,. numerous. outer. broad.. about. protoconch to. three. accessory. relatively. large,. whorl. angulated; which. weak. consist. in GIYU.. stored. common.. round. intermediate. sculuptures a. b). and. 250-260f;. thin. eroded;. b, 14a,. a,. WATANABE. of Ch6shi,. large,. by. covered. half. one. by. collected. Southeast. 13. Figs.. keels growth. four. at. present. lines;. lip; pillar straight, Operculum. seems.

(20) T.. 48. SIIIEAMA. Length..‥.,‥･..‥‥‥‥-･.--･･-････. i. of. is rather. like. Width. Measurements. Length. This it by. species. its larger. last. and. of aperture. width. A.. less radial. size,. whorl. ‥､‥‥‥‥‥‥‥‥. keels. and. Type:. Voluta. 11.6. 12.0×7.8. 11.0×6.0. is distinguished. plaits. obsolete. 20.8mm. 13.0. from. of columella.. VoLUTIDAE CROSSE,. PsePhaea 19,. but. californica DALL,. Family. Jour. Conch.,. ‥‥-‥. 24.5. 1871. 302.. p.. BRODERIP.. concinna. Fulgoraria. (PsePhaea). nov.. sp.. elongata. (ナガヒタチオビ,新称) (Pl. 2, Ⅱolotype:. An. ￣Referred. Locality:. East. Description:. fine. b). a,. by. HIRANO,. almost. or. on. collection. and. Whorls. penultimate. whorl. has. mella. two ovate;. elongately. bigber. relatively three. or. margin. obsolete as. distinct. plaits. of outer. lip thin.. are. rather. white. Measurements. Width. KAWAMURA's. 163. 146＋. 168. 48. 39. of last whorl. Length. Remarks: form. but. plaits. This. but. distinct plaits,. magna. is distinct. of this. plicae may. species.. is rather. and be. from. shoulder in. near. Some. having. shorter. shoulder. abnormal. daviesi. and. its unsolid. more. columella. whorls.. shape. form. is. In. strikingly of. magma. 172. come. 88.5×23.7. columella near. plaits, small. this more. columella. different has. mm. 54.5. in elongate. shell,. may. of. aperture. coll.. 82×24.7. Prevostiana. whorls,. its general. elongate. by. Colu･. 51. 83×20. to mentiens. them. of whorls.. angulated but. related. Prevostiana;. 163. 47.5. 70×19. 89×26. aperture. distinguished. untruncated. axial. of. width. species. is clearly. and. species. and. being. specimens. GIYU. .. of whorl. sharp;. Holotype Height.............. rather. gentle.. and. Referred. whorls. whorl. in. or. in. as. surface;. part. daviesi. shoulder. which. lines. penultimate. mentiens, broad;. than. on. its lower. downward, in. brown. lines. on. uniformly dull white. to. cbangiable. concentric. plicae. thin,. dark. sinuated. axial. inflated. not. with. rare.. rather. is eroded,. many. 18-20. bottom;. sandy unsolid,. surface. has. large;. not. smooth.. when. individuals. but becomes. shoulder. offine. elongate,. holotype. magma;. protoconcb. distinct. color; some. grey;. Prevostiana. that. GIYU.. in. Stored. specimensinKAWA肌RA's. 250-400f. narrowly. ground. yellowish. and. of Ch6shi,. Shell. brown. reddish. six. ll. collected. Three. specimens:. b,. in GIYU.. one. to. specimen. adult. 10a,. Figs.. also. from rather.

(21) on. aspect,. allied. elongata.. This. companied. by. 100. i),so. noteworthy. but. its suture. is. Prevostiana. and. γol. 21,. the. but. 1, p.. hirasei. south. former in. 49. Prefecture･. band. subsutural. region. the. &. Ch6shi. of. HAYASHI,. (80term･. of the. sense. strict. ac-. and. dweller. is shallower. the. in. than. 1960. 2･. SowERBY. (Musashia?). Fulgoraria. Chiba. with. sympatric. KuRODA. no.. Voluta. Type:. in. are. Musashia VenllS,. distinct. smiihi,. smithi. and. Ch6shi,. off. more. is distributed. species. this species. from. shells. some. 1961. (SowERBY),. smithi. (ウスヒタチオビ) (Pl.2, 1900. SowERBY: uniplicata SowERBY: smithi. voluta. 1901. voluta. 1934. Guivillea 35,. p. 1951. About. Remarks:. in apical. w･horls,. in kaneko. body. in. 19. ornage. tint,. colored. as. than. large,. about. deep;. layers,. columella. thin. a. wbicb. gives. shelr.. Measurements. of width. of. last. broad,. upper. long,. inBated;. much. coloured. is pinkish. with. is often. of vhicb distinct. same. plait of shinny aspect. as. follows:. Heiget. as. pre-. aperture. of. width. this. to. charming. and. with. white. and. length. 67mm,. whorl. one. with. are. specimen. unangulated,. shinny,且esh. lower. and. stronger. shell,. of wbicb. of the. moderate. whorls,. gentle,. of the. five. whorl. numerous,. very. shoulder. size･. above. of body body. in. rare･. with. striation. characteristic. large. very. in. Stored. is small. 200f;. and. length. length and. very. the. ;. relatively. two. by壬iIRANO,. margin. spiral. third. one. axial. color. 180mm,. 5,. no･. 9･ pl･ 112,fig･ Venus, vol･. HAYASHI:. brown;. pentlltimate. in cancellata. in. aperture;. outer. whorl,. aperture. with. white. served. in. third. on. 25mm. over. Jap･ Shells,. I11･ Shells,. one. greyish. and. osolete. weaker. broad. tint; callus. oran宮e. 91. 112,fig･. pl･. Cat･. other. of Ch6shi,. southeast. protoconch. about. and. 1･. ll,fig･. pl･. 161.. p.. Shells,. Ill･. the. and. thin,inflated,. ribs. and. distinct. suture. Jap･. collected. half. lower. miles. axial. very. whorl. Coll･. 8,. 970,. &甘ABE:. specimens. in. large,. Shell. specimen･,. than. 52. thoughbroken. whorls, large. Three. broken. of tbemis. Locality:. 9705, p･ 439,. Hist.,. Hist.,. 2.. 1, p.. described:. one. Nat･. Nat.. EIRASE's Handb･ (Sow.), Is. TAKI: KuRODA & (Sow･), (Musa8hia?) smithi. 21,no.. GIYU;. Mag･. Mag.. smithi. Fulgoraria. specimens. Ann.. Ann.. b). a,. 2.. text一丘g.. Fulgoraria. 1960. 9. (?) uniplicata (Sow.), HIRASE: (?) smilhi (Sow.), KuRODA. Fulgoraria. 1950. Figs.. lllx39mm. This raria white. Japan;. by. specis thin. separated. shell, inflated. body. columella before. from. is sharply. plait the. war. etc. we. whorl,. It is well could. not. see. the two. color. known specimens. as. of Japanese. species. other. layers one. of. of the. except. Fulgoby. a. callus. and. rarest. volutid. of. collections. of. in the.

(22) 50. HIRASE,. TERAMACⅡI Recently. war･. part. was. distant. this. but. as. or. not. whether. in his. species. S･. same. Biol. Soc.. Type. Wash.,. Pleurotoma. :. the. Antarctic. be. the. found. genus. Sea,. in. from. species. of. it a. such. Ensyu-nada. question.. with. BARTCf(,. vol. 57,. 1944 57.. p.. (Antiplanes). RectiPlanes. one. TtJRRIDAE. Rectiplanes Proc.. this. However, in. should. last. the. of which,. species. from. group. gained. Family. this. Put. Musashia. genus. fine.. very. in. two. offCh6shi,. is known. this genus the. and. HIRASE. destroyed. was. from. perfect. HAYAS==also. Japan･. as. region. put. the. of which. gained. are. Emperor･. question,. with. were. collection, to. is questionable,. the丘rst. specimens. several. offered. Guiuillea. and. KAWAM･OTO,. and. KAWAn4URA's. of. them. a. SHIEAn4A. T.. DALL. santarosana. (?) yukiae. nov.. sp.. (チチカケイグチ,新称) 3,. (Pl･ Type:. Two. Locality:. East. Remarks:. Shell. conch. and. spiral. sculuptures;. shoulders. about. half. of. with. length. and. writer's. HIRANO. and. WATANABE,. not. fusiform,. distinct. suture. but. aperture. narrow. sinuated;. columella. rounded. deep;. tolerabley. smooth;. body. whorl. large,. a. short,. wide. canal,. with. in. moderate. length,. Operculum. white.. margin. ; proto-. whorls. and. very. pillar solid,. thick,. turreted,. slender,. six well. angulated. shell;. truncated;. rare.. very. solid,. eroded;. the. no. relatively very. small,. Length.‥‥‥‥‥‥‥‥‥.‥‥‥‥‥‥‥. 30. 24. Width‥‥‥‥‥‥.‥‥.‥.‥‥‥‥‥‥.. 12. 11. 15×5. 14×4. Length. brown. by. linguiform.. Measurements. to. b). lustre, baying. shinny. whorls. broadly. straight, obsoletely. sized,. milky. first three. margin. R･. 4a,. collected. 250-300f;. medium. coloured. yellow. b,. specimens. of Ch6shi,. white. outer. 3a,. GIYU.. in. stored. beautiful. adult. Figs.. sanctioannis. (SMITII)is This. coloration. wife. who. and. died. in. width. distinct. less shinny. wider,. to. late. the. shell and YtJKI. by. olive. SⅡIEAMA,. the. of this study.. course. Rectiplanes. by. ........... is dedicated. species. the. of aperture. rnm. kaa･amurai. HABE,. 1958. (カ.ワムラエゾイグチ) (Pl. 3, 1958. Rectiplanes■kawamurai. Figs.. HABE::. 1. a,. b, 2a,. Venus,. γol.. b) 20,. no.. 2,. p.. 181,. text･fig.. 1..

(23) On. Specimen. some. noteworthy. described:. from. shells. Very. large. Chiba. offCh6shi,. specimens. Prefecture.. by. collected. 51. HIRANO,. in. Stored. GIYU. Locality:. East Shell. Remarks: eight. whorls,. distinct, surface. canal. and by. shell;. wide. and. long. olive. and. in. wide. above. large. about. periphery;. suture. the. succeeding. whorl;. apex. white. and. nearly. aperture. rather. truncated;. pillar. thin, large,. eroded,. large,. whorl. periphery;. margin. a. with. at. body. horny,. operculum. 7mm. thick,. periostracum;. sintlated; runs. collumella. pinkish;. and. overhanging to greyish. groove. broken;. margin. 14mm. feeble. a. angulated. whorl. distinct. fusiform,. solid,. obtusely. a. light. line. growth. of the. short,. brown,. flat. are. rare.. large,. conical,. wit血smooth. its outer. wide,. 350AOOf;. canaliculated. violet;. length. highly. which. deep, covered. reddish half. of Ch6shi,. lingual,. yellowish. specimen.. Lweindgtthh:...I.':.'.'.':.'::.I.A:.'.I.A.'::.'..::.･:.･.I::.･.･ Width.‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥. 2562 22 16 ;64mm. MeasurementsI Length Tbis. is very. specimen. described. by. specimen,. HABE. does. in. turrid. sea. 18mm. and. Ch6shi,. the type is in. There. long. off. being. size. length.. is 43mm. here,. 20×8. 24＋×10. .‥‥‥‥.. its large. 36mm. over. not. aperture. as. noteworthy. deep. of the. species. of. width. undescribed. which,. several. and. this. specimen. GIYU. another. wide.. Among. is the. species. in. rarest. occurrence.. Obestoma Proc.. Soc.. Biol.. Type:. BARTSCH,. γol. 54,. Wash.,. Obesioma. 4.. p.. BARTSCE. japonica Obestoma. 1941. nov.. sp.. oyashio. (ウスペニ-ラブトクダマキ,新称) (Pl. 2, Ⅱolotype IJOCality. white. のf the. shell;. tions. numerous,. with. smooth. BARTSCH. shoulder uneven. last whorl. by. many. Obestoma,. as. tint;. subangulated;. common.. thick,. 12mm,. is rather. length common. collectors,. but. ovoid,. and. and. and. yellow. width. and. has. it may. be. in8atedfive. with. large,. about. apex. narrow. white;. canal. and. lingual;. of aperture hitherto. been. distinguished. round length. three-fifth. eroded;. large,. ribs; aperture. thin,. GIYU.. in. Stored. last whorls. axial. horny,. small,. b). a,. protoconch. cover. and. f;. lip; pillar straight, thick. outer. species. 200-350. light pinkish. with. relatively. LOPerCulum. large. 15. WATANABE,. by. collected. of Ch6shi,. Shell. :. whorls,. This. East. :. Remarks. wid也of. Specimen. :. Figs.. stria-. axial and. short. suboval broad;. and. length. 25mm,. 15×5mm. regarded from. it by. as. japonica its larger.

(24) 52. SHIKAn4A. T.. number. of. Fisheries. axial. Steamer. Albatros. Station. at. dredged. is. BARTSCII. japonica. ribs;. in. 4983. by. Sea,. Japan. the. Bureau. U. S.. the. of. 428 f deep.. Pelecypoda Family. SoLEMYIDAE DALL,. Acharax Nautilus. 2.. 22, p.. Type:. 1908. Solemya. DALL. johnsoni. Solemya. tibai KuRODA. (Achwax). (スエヒロキヌタレガイ) Fig.. (Pl. 3, 1948. Solemya. 1950. (Acharax) (Acharax). Solemya. to. described:. GIYU.. in. stored. The. KAWAMURA's. dorsaト. anterior. being. strong. of. consists periostracum. at. posterior. the. bution very. of this species. in. the. adductor. from. beak. bands. gently. teeth. scar.,. curved. brown. 64. 49. 91. Heigbt‥‥.‥‥‥‥‥‥‥. 20. 19. 38. 11.5. 20. lingual. with. undulated. with. -. Including. gained. by. margin. of. (106)mm (56). epidermis･. CEIBA. offCh6shi It is closely. Japanese. with. prolongations･. ‥‥‥‥‥‥‥‥‥･. ):. the. margin. periostracum. Lengtb‥‥‥‥‥.‥‥‥‥. alternating. margin. while. greenish. to. and. ligament. and. subtrigonal, to. beak. posterior;. posterio-dorsal. posterior,. black. from. margin. ;. inaated;. much. margin. backward. belongs. species. rare.. not. dorsal. thick,. running. rare. other;. from. occurrence. common. 62,. pt･. WATANABE,. and. each. (. and. 10,. no1. offCh6shi.. and. anterior. than. HIRANO. 30-60fてVery. of. posterior. very. narrow. and. was. length. larger. from. thick. projected of. scar. ∫. holotype. off D6zan,. third. margin. Depth. The. 1-3･. text･fig･. Shells,. Jap･. this. of. gained. soleniform,. sculupture. strongly. Measure-ents. specimen. also. perio､stracum. radial broad. 29,. p･. by. collected. paralleled;. adductor. suboval;. lustre;. was. sized,. margins. especially. absent;. best. and. one. about. posterior. while. truncated. latter. large. γentral. crenulated. largest. Northeast. situated. and. 15,. volt. Ill･ Cat･. specimens. of Ch6shi,. Shell. low,. Three. which. Remarks: very. tibai. collection. Locality:. Venus, HABE:. KuRODA,. 1-3.. text-figs.. Specimens. KuRODA:. iibai. 5). from. may. related. Tertiary.. offErimosaki,. indicate to. the. Solemya. Hokkaido,. southern. limit. southern tokunagai. of distri-. YoKOYA池A,.

(25) On. some. Family. Type:. 53. KtJRODA,. 1943. 17.. 13, p.. vol.. Prefecture.. ARCTICIDAE;. Akebiconcha Venus,. Chiba. off Ch6shi,. from. shells. noteworthy. KuRODA. kau)amurai. Akebiconcha. KuRODA,. kawamurai. Akebiconcha. 1943. (アケビガイ). L943. Akebieoncha. kawa仇urai. KuRODA:. 1958. Akebiconeha. kawαmurai. elongata. 123,. p.. specimens. Locality: RemaTks:. many. surfacewith lost. are. which and. hinge. and. both. 1959,. stored. in. east. oblong,. thick. large. the. plate;. three. extremes. of. 17,. p,. 1-3.. text-figs.. Sci.. Nat,. Mus.,. 4,. vol.. 1,. no･. southeast. and. white. and. of Ch6shi,. 200-230f;. very. beak. by. alive. thin no. obsolete, anterior. dorsal. anteriorly; periostracum. strong. escutchen. two. left valve. line. pallial. upward;. rare･. situated. lustred. valves,. strong;. and. collected. strongly. both. on. united. short. specimans. with. 1unule. teeth. valve. right. ligament. to. specimen;. cardinal. small GIYU･. striations. concentric. in. sinus;. shallow. and. 46mi1es. Shell. 13,. vol. Bull.. OzAKI:. large. in. About. a-e). Venus,. Two. described: WATANABE. 耳IRANO and. 7. a-d,. 3, 4･. 5,丘gs.. pl.. 6. Figs･. (Pl.?,. of. de畠ned. well. margin. of. with gapes. valves. eminently.. Measurements. The. holotype to. gained. from. belongs. to. with. treated by. the. described but. the. individual. the. 60. tleight‥.”.”..‥.…..‥･.------･. 36. 65. Depth. 20. 51. ･‥‥‥‥･‥･‥…---･----･. found. was. KAWAMtJRA's. belongs. them. Length‥･.‥‥‥‥‥‥…‥‥------･. the. by. has. the. one. smaller. they. subspecies of. same. ventral. and. such. T･･. Proc.. Type. uS. :. Nat.. Mytilimeria. Mus”. jlexuosa. which. compared. and. elongata. Which. is distinguished. The. large. specimen. margin･. looks. and. the. very. writer. VERTICORDIIDAE. 17, p.. Who. of. OzAEI. character;. Halicardia. latter. the. Ikego. variation.. Family. were. specimens. OzAKI. by. and. N?-arai-. compression. lacks. EAR4ADA,. 100f. about. succeeding. illustrated. are. from. new. compression. also. Y･. Akebiconcha as. SagamiBay. henceforward. FuJIYAMA,. collection;. fossil. fossil types. median. off Odawara,. collection;. off Ch6shi SAKURAI's. from. 117m皿. DALL,. 1895. 697 VERILIJ. &. BARTSCII. formations. much thinks. and. here. like elongata, this. is. only.

(26) 54. T.. Halicardia. SIIIEAMA. OKUTANI,. nipponensis. 1957. (ニッポンオトヒメゴコロガイ) (Pl. 3, 1957. OKtJTANI: nipponensis 28, pl. 1,figs. 2, 3, 6, 7.. Specimen. described:. A. a-c). Bull.. specimen. Reg.. Tokai. Fish.. Res.. alive by HIRANO. collected. Lab.,. 17,. no.. in 1958,. stored. inflated,. stout,.. GIYU.. in. East. Locality: Remarks: medium. tudinal. grooves. posterior. of. and. dull. portion. dorsal. corner. microscopic. 23mm,. depth. surface. posterio-ventral than. much. anteriorly by. portions. to. anterior. margin. posterio-dorsal. margin. largest. subcircular gently. longifrom. and. notched;. with. longest. and. anterioSurface. curved.. Length. striations.. radial. distinct. distinctly. one. median. lunule. and. anterio-γentral-. bo也corners. and. delicate. and. rare.. bent. three. corners;. margin;. projected;. granules. beak. of beak. posterior. γentral. globular,. into. anterior. very. sand;. coloration;. divided. from. smaller. 24. height.. mm,. 20mm.. bolotype. (750 m),. Bay. from. off Ch6shi.. from. off Ch6shi,. is gained. of this species. of Sagami. OKUTANI,. to. offine. unequilateral,. valves. run. sharply. with. The. both. curved. strongly. in. white. which beak. 250-380f. equivalve,. depressed;. and. anterior. of Ch8shi,. Shell. sized,. short. than. 8. Ealicardia p.. part. Figs.. Beside. DAI.L,. in gouldi. and. this specimen. is. this species. BARTSCE. there. Type:. Comp.. Zool.,. Lyonsia. bulla. specimerL specimens. respectively,. After. of ventral. margin. from. offHawai.. PoROMYIDAE. Ctenoconcha Mus.. three. notches. is gained. eastern_. second. about. SAKtJRAI. deeper. Which. Family. Bull.. has. and. 139o33′3E,. gained. known. are. and. REHDER. &. OEUTANI. KAWAM:URA. to. inflated. more. 35oO5/N,. henceforward. belong. which. from. DALI.,. 1886. 280. 12, p.. DAI,L. Cienoconcha. HABE,. japonica. 1952. (ダイオウスナメ) 1952. Ctenoconcha. 3'aponi6a. 9. (Pl. 3,. Figs.. HARE. Ill. Cat･. a-e,. 10). Jap･ Shells,. no･. 21,. p･. 159,. pl･ 22,figs･. 2-4.. Specimen Locality:. Described: East. Remarks: al;. γentral-. Shell and. Adult. of Ch6shi, large. as. anterio-dorsal. specimens. 250-300f; Poromyidae, margins. collected very. by. Stored. in GIYU_. rare･. thin, suboval, gently. HIRANO,. curved,. equivalved, while. unequilater-posterio-dorsal.

(27) On. is. ma-rgin. nearly. numerous. sinus; larly. lunule. and. long. HABB smaller. beneath. obsolete;. umbo;. plate. thin. many. radial. shallow. adductor. scar. to. umbo;. posterior. pallial irregua. broad.. rather. The. specimen.. net. of very. with very. anterior. larger. a. and. with. cardinal. in. 19mm. small. Length is. bolotype. high.. C.. species.. size, thicker. smaller. obsolete. with. granules. periostracum. lustred. lies immediately. and. this species. rounded. line. 55. Surface. minute. colored;. pearly. very. depth. compared. silver. palial. small. 13mm. and. or. Prefecture.. anteriorly.. innumerable. white,. escutcheon. 25.8mm,. height. 16.2mm. and. is situated. tooth. 35mm,. scars. is situated. and. white. Chiba. offCh6shi,. carry. of shell. ligament. trigoral;. cardinal. blunt. whic血. Inside. addnctor. no. beak. greyish. olive-yellow.. from. shells. striations. arrangement;. striations;. a. noteworthy. straight;. radial. work and. some. shell. with. C. burioni. eximia. PRASHAD. PRASHAD is. Strait,. distinguished. easily. of posterior. and且exure. the Buton. from. its. by. portion.. References 1). BARTSCH,. P.,. Proc.. 1941.. Biol.. 2). Wash.,. CLENCH,. W.. nomenclatorial. Wash.,. 1944. Soc･. The. Soc.. Some. vol.. turrid. vol. TuRNE王R,. Cylindriscala,. status. of. certain. turritid. northern. mollusks.. 1-14.. pp.. Monterey. of. mollusks. Bay. and. Proc.. vicinity.. Biol.. 57-68.. 57, pp.. &. 54,. R.,. Nystiella. 1952.. The. and. Epitonium. genera. Soluti8Cala. in the. (part 2), Depressi8Cala, Johnsonia, vol･. Atlantic.. western. 2,no,31.. 3). DALL,. W.. E.,. 1908.. dredgings. the. Paci丘c,. Descriptions the. U.S.S.. Okhotsk,. and. of. Bering,. new. of. species. Japanese. Buccinidae,. of shells, cbie且y in during 1906,. ``Albertross〃 Seas.. Coll.,. Misc.. Smiths.. from. Northwestern. the. 50,. vol･. pp.. 139-173. 1921. coast. America,. of. in. the. FuJITA,. T･,. HABE,. Die宮0,. States Unit,. to. Stat.. mollusks. the. National. dredged. the. Fissurellidae. Chosbi, 6. HIRASE,. 7. KIRA,. T.,. 8. KIRA,. Museum,. Nat.. northwest. mostly. with. contained. illustrations. of. Venus,. 1,. 112.. Musリbull.. Bay.. of Tateyama. shells. the. of. Sea,. polor. vol.. T.. from. 1958.. On. Chiba. Pref.,. 1954. &. γol. T.,. 1919.. no.. 1931. Japelion.. species. of. Mar.. Seto the. Biol. Lab”. vol.. 3,. from. Rectiplanes. genus. 1･. no･. Japan･. Opisthobranchiate. shell･bearing Japan. Annot.. Zool.. fauna. molluscan 31,. 丁ap., γol.. from. off. 2.. no.. Jap. Shells. Jap.. 1949.. Notes. on. Japanese. species. of. the. Puncturella.. genus. 5-8.. Notes. descriptions and in the report of Mr.. Bay. On. Pub.. (2).. new. Ill. Shells. T.,. 15,. Japan. of 3. Coll, Coll.. Tateyama -,. the. HARE,. in. 2.. no.. S., 1934.. Venus, KuRODA,. Descriptions. γol. 20,. Venus,. and. 1953. 1958.. --･-I--,. 9). on. shell California,. 3.. no.. 5). Report. bearing. marine. Inst.. species.. 1929.. the. United. the. of. un丘gured. T.,. of Sam. from. collection. bitberto. 4). Summary. the. Venus,. Japanese vol.. 2,. species no.. 5.. of. of some T. FuJITA. the. new. chrysodomid. and Venus,. noteworthy. vol.. whelks,. 1,. species no.. 3.. Anci8trOlepis.

(28) 56. T.. KtJRODA,. T.,. 1943.. 1948.. Akebiconcha,. Two. KuRODA,. T.. &. HABE,. T.. ll). KuRODA,. T.. &. HABE,. T.,. mollusca. 12). T.. Rep.. Mar.. 14). OLDRYD,. Res.. H.,. 17). 18). TAK‥,. Is.. Kwanto. 19). &. Jour,. shells. marine. recent. and. a. new. of. species. from. the. SurvI. of Kashima-Nada.. sea. 1956.. Tokai the. of. the. deep. water. Reg.. Fish. Res.. of. North. west. coast. in. Bay. Sagami. Lab.,. 17.. no.. Stanf･. America･. i-3.. pt.. in. Noto. southern. Japan.. of. and. The. K.,. Japan.. peninsula,. 1920,. S°i. Imp.. Pal.. Univ.. Bull.. from Tokyo,. 49a,. Pap･,. Miura. peninsula. vol.. 39,. art.. 6.. 44,. no･. no.. the. on. Mus,,. Siboga pt･. Pleistocene. Jap. Spec. the. vol.. studies Nat. Sci.. the. of. Exped･,. YoEOYAMA's Soc.. Jap.,. paleontological distirict.. Siboga M･. Fossils. Soc.. Prosobranchia. 19541. in Japan.. Geol.. Jour.. Tyosi. the. Docoglossa･. Oyama,. M.,. Coll.. the. 1. 2,. 1908･. and. region. YoEOYAMA,. Shells.. of. subgenus. from. Bull.. Stratigraphical. M.M･,. Rbipidoglossa. new. bivalves. of. marine. in. Diodora formations. ScHl]P班AN,. of Japanese. Bull.. Earthq.. 13.. 1958.. Pleistocene. a. shells. Soyo-maru.. ()ti Graben. The. 1937.. OzAKI,. molluscan. SciリVOl.. 1935.. InstリVOl. ー---,. 1-4.. 1.. no.. species. Ibid., vol.. 1927. Y.,. Otuka,. Catalogue. bibliography. and. Vill. Tokai-mura,. Sea. The. Geol.. On. 1960.. on. new. R.V.. the. Pub.. ----,. 16). Rad. Two. Ⅰ.Sリ1924.. Univ.. 15). Org.. by. collected. illustrated. List. Check. 21,. vol.. Notes. 1957.. -----,. 1952.. S.,. Venus,. Tリ1957.. OEtJTANI,. 1949-53.. others,. BAYASHI,. &. Fulgoraria.. 13). &. 114.. no.. new. Japan.. of. KuRODA,. Venus, 13, genus. vol. pelecypod no. 15, Venus, species of Solemya. vol.. a. newgigantic. 10). SEIKAn4A. 529. Neogene vol.. Expedition,. and no.. 1.. pt1. 1,. 4,. 1･ and. later. fauna. from. the. 2･. and. its. immediate. north,.

(29) See.. Hasegawa. photo.. ⅠⅠ.Plate. I.

(30) Plate Figs.. Figs.. 1 a,b,2 3 a, b.. Puncturella. a-c･. Puncturella. Figs.. 4. a,. Figs.. 7. a-c･. Figs.. 8. a,. b･. E仇arginula. Figs.. 9. a,. b･. Diodora. Figs.. 10. Fig･. b, 5,. 11･. 12. a,. Tosa Figs.. 14. 6● Emarginula. Diodora. Diodora. Miura Figs.. b.. a,. ,. a,. xO.64. b, 15. a,. a,. b･. 4axl,. 4bxl.1,. from. a,. 5,. Holotype.. 6. ×1.2.. bxl.2.. cxl.1,. ×1.1.. bxl.2.. aXl.1,. Fukuoka.. fossil from. ×1.1.. Miyata. tosana. convexiuscula. Ch6shi,. ×1.1.. bxl.5.. nov.. sp.. A. &甘ABE.. Holotype.. OTUEA. OTUEA･. ×1.1. b･ Lis6hkeia. b, 16. HAtlE.. nov.. OTUEA.. yokoyamai koshiben8is. 13 from a,. fujitai. sp. amyda kashimaensis. yokoyamai. city, b, 13. SHTI(A拡A regia OTUEA. aXl.4,. hirasei. Emarginula. 1. formation. subsp･. of 12. nov･. Motoyashiki,. Holotype. from. ×1.3.. Calliostoma. (Akoya). akoya. IEEBE.. 14×1.4,. 15×1.6,. 16. ×1.5.. Figs.. 17. a,. b, T8･. Figs.. 19. a,. b.. Figs.. 20. a,. b, 21. Figs.. 22. a-d,. Epitonium. Epitonium. 23. a,. a,. b･ b･. (Boreoscala) groenlandicum (Boreoscala) groenlandicu仇CHEA(N.. Nystiella Hazuregyra. hiranoi. sp･. watanabei. nov･. sp.. 21 nov.. japonicun from. Holotype. ×1.4.. subsp.. Tajimi. xl.4.. nov.. × ×. 1.5.. 1.4..

(31) Sec,. 5a. 4b. 4a. 9a. Hasegawa. photo.. ⅠⅠ.Plate. II.

(32) Plate Figs.. 1. a,. b･. Ancistrolepis. hiranoi. Fig.. 2･. Ancistrolepis. kinoshitai. Fig.. 3･. Ancistrolepis. fujitai. Figs.. 4 a･. b･. Colus. Figs.. 5a,. b.. Buocinum. Figs.. 6a,. b.. Buccinu仇Sp.. Figs.. 7a,. b, 8. Figs.. 9a,. b.. 6ala肌euS. b･. a,. Figs.. 10. a,. b, ll. 12. a,. b.. Figs.. 13. a,. b, 14. Figs.. 15. a,. b.. a,. b･. Ad仇ete a,. from from. KuRODA. subsp･. schantaricum. ×0.7.. Ensyu-nada,. Ch6shi, nov･. ehoshiensis. ×0.6.. ×0.6.. =olotype,. ×1.1.. nov･. subsp･. Holotype,. ×. 1.2.. ×1.2.. Nassaria. Fulgoraria. Figs.. IIolotype,. nov･. sp･. KuRODA. hiranoi. 2. b･. Obe8tOma. 7×1.4, 8×1.7. oむesijTor仇isYoEOYAMA. (Musa8hia?) ×0.5. smithi (SowERBY).. Fulgoraria Watanabei Admete OyaShio. (Psephaea) sp.. nov.. choshiensis sp.. nov.. elongata. Holotype, sp.. nov.. Holotype,. sp. ×1.5. xl.5.. xl.5.. nov.. 10. Holotype,. ×0.5..

(33) Sec.. ⅠⅠ.Plate. III.

(34) Plate Figs.. 1 a,. b, 2. a,. b.. Rectiplanes. kawanurai. Figs.. 3. b, 4. a,. b･. Rectiplanes. yukiae. Fig.. Figs.. 5.. a,. Solemya. 6 a-d,. Figs.. 8. a-c._. Figs... al-e,. 9. 7. (Achara打) a-e.. Akebiconeha. Ealicardia 10･. tibai. HABE.′ sp.. KuRODA.. ×1.1. 3 Holotypexl.6,. nov.,. 4×1.5.. ×0.7.. kawamurai. nipponen8is Ctenoconcha japonica. 3. KuROI)A.. OEUTANI. HABE.. ×0.6.. ×1.2. 9. a-dxl.4,. 9. exl.5,. 10×1.1..

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