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(2) 12. N.. Dimensions Loc･. Length,. :. Off. 450FL;. Manazu.ru,. Subgenl描II,. 2.. Ceratium. 1911,. 1954,. WooD C.. Furca. GouRRET. Mid-body the. curved. toward. girdle.. much divergent.. Dimensions. Ceratium. 1920,. 1954,. C.. Body epitheca and. moderately Hypotheca. &. 12,. p.. figs.. 1920,. OEAMURA WooD. Body Antapical. 1954,. p.. elongate. horns. p.. 32,. p,. 16,. and. much. up. toward. the. the than. 4, 5, pl.. 2,軸.. previous higbt. three Ridges. 22.. species. Surface. horns and. of stout. pores. mid-body. 115p.. transdiameter, 18, 1956.. FurcifTol･mia. 2,. in. Usual. of the. surface 210p;. pl.. Ⅰ,figs.. pl.. girdle. divergent. moderately. Feb.. 17,. 1911,. than. the. 17,丘g. p.. 3.. 68.. broader. J6RGENSEN,. fig.. 23a,. 1911.. Pl. III, Fig.. DuJARDIN.. (EHRENBERG) p,. 63,. 且attened. Length,. 1911,. Pl. III, Fig.. J6RGENSEN.. low,. more. SectiorL. 1920,. tL.. A.. J6RGENSEN. horns On. furca. in shape, ●sligbtly. 18, 1956.. (PoucHET). pl. I,丘gs.. 421,丘g.. and. Antapical. J6RGENSEN. 41,. p.. p.. 0ffManazuru,. Ceratium. are. 5, 6.. dilatatum. warplng. strongly. sometimes. triangular horns. up. 187b.. depressed. conspicuous markedly Dimensions:. 4.. straight,. and. somewhat. Feb.. dePressum. 1883,. broader. Loc.. long. Hatsushima.. var.. ∀ar,. straight.. is warping. of epitheca. two. 1883,. candelabrum. strongly. t. surface. side.. GouRRET. Mid-body. 67.. The. right. PoucHET. C.furca. A.. 46.. p.. horn. 273,丘g.. p.. dilatatum. 1883,. thick.. and. candelabrum. WooD C.. pl.. GouRRET. Manazuru. J6RGENSEN. p.. 4,丘g.. right side, Both antapical lists conspicuous, with spinules. Length, 120-180FL; 55-70 transdiameter,. :. Off. 2.. Pl. III, Fig.. p. 417,丘g.. 1883, 47,. the. on. Cingular. Loc.. STEIN,. Apical. the. depressed. 3･. 1883,. parvum. ∀ar.. pentagonal. toward. 1911.. J6RGENSEN,. 21.. PoucHET. depressa. dilatatum. 2,fig.. pl.. 1897.. 272.. p.. var,. C, globatum C.. 16,. p.. VANIi6FFEN,. CandelablTa. (EHRENBERG). candelabrum. J6RGENSEN. 1956･. Biceratium. SectioII. 255IL.. transdiameter,. 15,. Jan･. Kato. 4a, b.. b.. 7. pl.. 9,fig+. 96a-c.. 274.. Epitheca parallel. with. gradually each. other. converglng or. somewhat. toward. horn. the aplCal divergent, pointed.
(3) on. tip･ゝ The. the. at. than. 5.. sP. Pl. III, Fig･. Epitheca. elongate Posterior. horn. long. very. twice. long. as. of. former. the. right,. are. Loc.. the. Manazuru,. Off. 6.. Ceratium. 1883,. GouRRET. 1911,. J8RGENSEN 1954,. c･ furca. Mid-body. 33,. p.. 276,丘g･. p.. baltica. var･. pl.. 20,. p.. 1920,. MARUKAWA wooD. 45,. p,. left. one. Ⅶ￣ith. 30-35pI. 1911･. J6RGENSEN, 9･. Fig･. 58｡ 31,. 10,fig･. 32･. 161a-d･. 191a-f･ ENTZ. Sc壬IiiTT,. 1905,. p1. 104,. broadly. Epitheca. pentagonal･. the. Apical. backwards. projecting. ; transdiameter,. 2,丘gs･. pl･. as. side･. Pl･ IV,. 4,丘g･. pl1. long. as. excavated･ horns, the. antapical. straight,. Pentagona. GouRRET･. Pentagonum. times. 9, 1956.. June. section. and a half is angularly. usually obliquely outwards, on The the ridges of mid-body･ usual have the dorsal side, but they somewhat. ventral 110-130p. Length･. Dimensions:. 〟･. projecting. on. elongate. on. appearance. neトwork. one. Of mid-body two Of the. straight･. mid-body. 32-40. 1955.. angle with the girdle, the latter right a little shorter than the transdiameter. surface. mid-body･. about. margln. the. as. is. left, which. the. as. 8a, b･. triangular,. and. long. as. trlansdiameter,. 〟 ;. 13,. Nov.. Ceratium. hypotheca･. of. 190-200. 0ffManazuru,. half. one. transdiameter. Length,. 13. "Ceratium''(Dino且agellata). of. is about. horn. the. Dimensions: Loc.. Species. right. little longer. a. The. 60o. Bgs･. 6-11･. triangular･. side. horn. Apical. marglnS. long. and apex･ about divergent h-orns stout and sharply The and moderately antapical straight･ as is the right, which left horn twice as long at the tip'tbe about pointed The one half the transdiameter surface of mid-body less than of mid-body･ irregular large is sculptured pores ridges･ and with 65-75 p･ 170-260p Length, transdiameter, ; Dimensions: forming. an. Loc.. of. angle. 15,. Jan.. 0ffManazuru,. stlbgenus. at. the. the. 1956･. sectior!_ FusifTol･mia 7.. Ceratium. &. oKAMURA. 1920,. ー-WooD. 1954,. c. pellucidum. 1904,. NISHIKAWA 1911,. J8RGENSEN. DuJARDIN･. (EtIRENBERG). fusus. p.. p. p,. 29,. pl･. (VANfI6FFEN)･. Amphiceratium. III,. 2,figs･. p･. J6RGENSF,N,. GouRRET. 127,. pl･ 6,figs･. 51a,. b, 52,. 53･. 202･ 1883,. p･. 1911･. Pl･ ⅠII,Fig･. 41.. 282,fig･. very. 54, pI, 4,fig･. 66･. 22,. 23･. 5a,. b･. c･.
(4) 14. N.. Epitheca horn,. elongate,. sometimes two. Loc･. fusus 1911,. WooD. 1954,. p.. apical. and. the. right. Ceratium. 1911,. 310p. 26,. 2,丘g.. pl･. ll,fig.. 111a,. concavum. GouRRET. 1883,. C･. var･. concaDum. OEAMロRA. &. long. narrow,. gradually Left antapical. upwards･ curving very. upwards but short. relatively. Off. Ceratium. 1954,. C･ fusus. An. 1911,. 1920,. -. var･. p.. p.. p.. 283,丘g.. extensum. longer apICal. horn･ bent. pl.. rig.. the. pointed /A;. 64.. 1904,. pl.. depressed･ apical. horn as. almost distal end･ at. the. transdiameter,. 6,fig,. 24.. Epitheca which long as. very. is slightly the. Right. apical. antapical. long bent horn, born. tip. 32. 〟.. 9, 1956.. June. 28,. 43,. long extremely hypotheca, than. slightly. 620. (GouRRET). extensum. J6RGENSEN WooD. Manazuru,. long. near. strong,. Length,. a. 4,丘g,. pl.. NISHIEAWA. thick-walled,. leftwards. and. Dimensions: Loc･. horn. 53,. rather. to. tapering. b.. p.. Mid-body. species･. 7.. 48a.. var･. very. is shorト. 23FL.. ; transdiameter,. Pl. III, Fig.. pl.. 35,. p･. horn. antapical. 9, 1956.. June EoFOID･. p.. including. epitbeca.. C. fusus. A and. 55.. Hypotheca. Manazuru,. 1920,. fusus. b.. present. Length,. MARUEAWA. 6a,. the typical C. fusus, variety resembles horns are more antapical of this variety slender, horn is entirely disappeared･ The two long horns. 1,ennatum. J6RGENSEN. 10･. the. antapical. Dimensions:. 9･. Pl. III, Fig･. J6RGENSEN,. left. the. and. Off. 〟.. 1956.. pl. 2,丘g,. slightly curved upwards･ but rarely longer, than Loc･. length. 30.. aspects･. the. 15-25. total. 283,. p,. general. but. er,. 29,. p.. 40,丘g.. the exceeding is rudimentary.. one. right. (EHRENBERG). seta. long,. ; transdiameter,. May-Aug,. var･. 1920,. the. 300-550〟. 0ffManazuru,. Ceratium. is very. one. epitheca;. Length,. J6RGENSEN. are. left. including. Dimensions:. toward long converging the apical base, slightly bent upwards, but as broad as almost Of the eptheca.. the. Hypotbeca. straight･ horns, the. horn. of apical. In. but. almost. antapical. 8･. is gradually broader at. and. is slender. which. Kato. 2,fig.. CLEVE.. Pl. IV.. 50a,. b.. 1883,. p.. Fig.. 10a,. b,. c.. 31. 203a.. GouRRET. 52,. pl. 4,丘g.. 56a.. Epitheca narrow, species･ elongate姐d usually is gradually and the long, continuous with slender Left horn long antapical extremely and-slender, sometimes Right born upwards･ antapical rudimentary..
(5) On. Dimensions Loc･1 11･. long. is gradually ing upwards.. strong,. 1750-1950FL;. lla,. the. as. as about one丘fth Dimensions: Length･. StlbgerLtlS. Ceratium. tripos. OEAMURA. &. Dec･. 1920,. 1920･. WooD. A. 1954,. rather epitheca sqrface. jecting left. p.. The. horn.is. pl･ 14,丘g･. 40･. two. more. 1911,. MARUKAWA. 130a,. 15, [1g.. pl1. 130b.. horns. are. long,. as. long;. as. the. the. long. Apical. concave･. to. as. epitheca. surface. of the. epitheca,. horn. pro-. slightly. left. the. the centre side from developed, but occasional]y. well. of. the. 4,. pl.. 40-41,. of. of. aspect. Dimensions. the. of ･･. 0ffManazuru,. PAULSEN･. (OsTENFELD). pl･. 132a,. 15,丘g.. that. epitheca, irregular. as. of. Pl･ ⅠⅤ,Fig.. as. shape. and list. on. to the. former. that. species, hypotbeca, of. arrangement･. either surface. side. near. of the. margin resembles that of 220-240 ” ; transdiameter, 83-90. Dec.. 13a,. b.. b.. the. well. posterior. Length･. 70-90p.. Liz. 74.. resembles. surface by ridges. transdiameter,. 13, 1956.. neglecta. 37,. pp1. almost. 230-310FL;. a marked with wing-like and serrated half, the list being partially continuous. Loc･. b.. 65-79.. generally. less. or. May. p.. 1920,. Mid-body. general. 12a,. Fig.. 1.. 4,丘gs.. pl.. is deviated. Length,. ･･. tnl,os forma. J6RGENSEN. sculptured. 6,丘g.. pl･. flypotheca. antapical. 0ffManazuru,. Ceratium. species,. Pl･ IV,. longer.. Loc･. the. 121, 1, 2,. 1903.. Mid-body as broad species･ nearly low, sometimes as twice broad as. and. Dimensions. 13･. p1. convex･ moderately its left of side is its base rightwards,. epitheca･. p･. 1901.. 284.. large. rather broad. one. about. 47.. p.. MARUKAWA. OsTENFELD,. NITZSC=･. Ⅰ,丘gs･. pl･. OsTENFELD,. (GRAN). Tr(Dos. 1904,. 35,. p･. upwards, born antapical. 1955.. Euceratium. NISEIKAWA. wbicb. curving. and curv-. the. 12,. (0･ F･ MtiLLER). 1911,. J6RGENSEN. also slightly The right. elongate, is slightly. moderately left, sharply at the tip. pointed 31IL, ; transdiameter･ length antaof right. as. 710p. SectiorL. FL.. Epitheca. species･ born, apical. long. born･. long. IV･. 40-44. former. horn. apical. pICal hわrn, 41 Fb. Loc･ 10ffManazuru,. 12.. the. converging Left antapical. transdiameter,. 15. b.. in the. as. species. (Dinoflagellata). 9, 1956.. June. into. long. as. Length,. :. Ceratium”. =. of. sp･ Pl･ 1V,zFig.. very. half. Species. 0ffManazuru,. Ceratium A. The. 25,. 1955.. var. FL. but. in. this. is加ughly. Apical. born. the. proximal. epitheca. atlanticum.. is. The.
(6) Eato. N.. 16. 14.. Ceratium Go口RRET. 1883,. 1920,. MARUKAWA. 1954,. wooD c.. Tripos.. low,. the. right. than. margln. Of mid-body. its tip sharply. with running. parallel Length,. Ceratium. 1911,. J6RGENSEN. 1920,. ---. WooD. 1954,. deviated list. on. to. There. Ceyatium. 1911,. MARUK-AWA AB丘1927,. 426,丘g.. p.. c. heterocamPtum;. Mid-body horn. round′ed. is rather. circular. but. the. of. strongly. curved. 70-95. p･. 21･. Fig.. 133a-f･. in. outline, near好triangular scout and straight, its base moderately of. centre. horn･. several. on. a. obliquely. outwards,. the. ”; transdiameter,. that. the. of. surface of 40-46IL･. longer being. serrated. shorter. but. forward,. is. is somewhat. projecting. ridges. There. epitheca･. Hypotheca are. 135-170. than the one. right. the. mid-body･. 12, 1955･. heterocamPtum-. var･. pl. 3,fig.. J6RGENSEN･. Pl･ VI,. Fig･. 22･. loll. 41L, pl. 17,fig.. 137a-c･. 43.. PAULSEN. 1908,. 76,fig1. p.. in outline, its base deviated. triangular. and short The two antapical. of epitheca･ t｡ form a that. p.. and. 102-105･. the. Dec.. p. 48,. 1920,. 18, 1956･. projecting. Lingth,. bucePhalum. J6RGENSEN. Feb.. horns. are. 0ffManazuru,. Loc. 16.. :. is. apical. two the antapical epitheca, distal end of the left horn. lnWard･ strongly Dimensions. transdiameter,. Mid-body. from. the. of. ” ;. pl･ 16,丘g･. left side side. almost. 221a･. species. horn apical. the. either. 41,. p.. Base. ￠f epitheca･. margln. side. but血ucb. outward. horn. antapical. one. 62.. 294,丘g.. p.. right. 48, pl･ 3,丘gs･. 62,丘g.. p.. medium-sized broad. The. than. p.. Right. Pl. VI,. CLEVE.. 1920,. MARUEAWA. the 240-296. obliquely. projecting. strong,. the. broad. and. left. Obliquely lnWards･ is stout horn and. runs. Apical. convex･. broad. horizontal, very. the. of. is extremely. also. margln. side. some. pores,. and. rather. Hypotbeca. Jan. 16;. arietinum. and. pointed･. to. 0ffManazuru,. Loc.. A. left. is strongly born antapical. Left. long. oblique･ its. epitheca,. Dimepsions:. 15.. and. short. deeper. inwards,. minute is margln. its. dorso-ventrally;. Epitheca. bumps･. into. side. comparatively. straight. forward,. 13･. 421,丘g1. p･. and. developed. are. ridges. 1853,. massive, so血ewhatflattened by irregular ridges scu､1ptured. markedly. surface. b･. PouctIET. megaceras. thick. 118a-c･. ll,丘g1. pl.. 114a,. 290,丘g･. p.. var.. Mid-body. 38,. p.. 17･. 35･. 36, pl. 2,丘g･. p.. Fig･. Pl･ V･. GouRRET･. gibberum. the base to. the. margln. left. side. SVJollen･ from the. Apical centre. so as curving lnWard, elegantly tip of the left horn projecting forward,. horns. The outline. one inward･ right. lol一. are.
(7) On. The. Dimensions:. Length,. Loc･. 0ffManazuru,. Ceratium. limulus. 17.. Go口RRET. 1883,. OKAMURA. J6RGENSEN. A gate. small. 57,. p･. species,. with. long. are. moderately distal half. ridges. Length,. &. J6RGENSEN. 1911,. A. small. gradually. broad. and. The. distal. two. of. these. each. mented. horns,. someti血es. well. as. 0ffManazuru,. Section 19･. Ceratium 0Ⅰ(AMロRA. horridum 1907,. t血eir. margin horns. lea,. b.. 10.. 125.. triangular in outline, rounded is long, its proxi: which extremely list on Eypotheca either side･ rat-her is slightly concave･ The base m&rgid. are. rather. long. and. notably. parallel. broadened. in. with each the tip being other, The inner outer and margins of in proximal balf･ Almost entire outer margin posterior margln is elegantly Of mid-body orna190-240. Pumata. 129,. 6,丘g.. 1911.. truncate･. Jan･. GRANT p･. 〟.. 147a-a/. serrated. list. with serrated Dimensions: Length, Loc･. with. horn,. almost. thickened as. base,. horns. Epitheca. apical. side. thirds;. are. 124,. 18,丘g.. pl･. with. antapical. these血orns. antapical. 226.. into. its left. but. 124, pl･. p･. species･. two. blunt. usually. 44,. ornamented. convex･. elon-. 72.. and鮎ttened. low,. the. 54-55. J6RGENSEN, Pl･ Ⅴ, Fig.. 6,己gs.. pl.. 297,丘g.. converglng. half. mal. 58,. 79,丘g.. p.. p･. posterior blunt･ Both from. rather. its rounded; is margin rounded. and. 10, 1955.. 1904,. p･. 1954,. the. 〟; transdiameter,. DADAY･. VON. p.. MARUEAWA,1920, WooD. Mid-body. expanded. its apex. PTatycwnia. NISE=EAWA. 1920,. pores,. with. Dec.. platycorne. OKAMURA. flat body･. markedly. and. 74-80. 0ffManazuru,. Ceratium. and. flat, dire-cted forward. SectiorL 18.. b.. convergent.. Dimensions: Loc･. 145a,. b.. broad,. and. slightly. 15.. 8.. horns short its shoulder. is sculpturqd闇ith horn is short and. surface Apical. Fig･. 7.. 18,丘g.. 223a,. with. quadrilateral,. 52〃.. 712.. 296,丘g.. p1. 17. 6,丘g,.122.. 43, pl･. p･. transdiamete.､r,. 3,丘g.. pl･. 77,丘g.. p. 1920,. 1954,. 1,丘g.. pl･. (Dino且agellata). 10, 1955. Pl･ V･. 127, pl･. p･. 1911,. MARUKAWA. 33,. p･. 1920,. 158〝; Dec.. Ceratium=. 〟. of. Go-RET･. 1907,. Ⅶ￣ooD. Species. 14;. transdiameter,. 〟 ;. Feb.. 12,. (PAVILLARD) Pl･ V,. pl･ 4,丘gs.. Fig･ 21,. 23.. 14.. 50-62. 1956.. J6R?益NSEN,. 1911.. 〟..
(8) N.. 18. wooD. 1954,. A. convex. margln. Of mid-body. is. almost irregular. half,. to. Loc.. 1911,. MARUEAWA. 1954,. horn. mid-body. with. Loc.. 1911,. 1954,. the. 1920,. wooD. p.. 1954,. 350p; 25,. 1904,. p.. p. ,63, pl. 7,丘gs. p. 47, pl. 19,fig.. 427,fig. p.. half. projecting. agaln. turning. of. mid-body･. surface. Pl･ VI,. J6RGENSEN･. ob-. Fig･. 20･. 311,丘g.. 44a,. b,. 238b.. c,. d･. 27c-g･. pl･ 22,fig1. The. former. left. antapical distal. ･the. antapical. horns,are. outer. 122, 132a,. pl.. 6,. 85. Pl･ VII, fig.. b, 133･. 153a-d･. marked. 2.. p･. Fig･. 23･. o士. epitbeca. born two. border･. transdiameter･ 1955･ CI.EVE.. but. the. forwards,. o土tbe. (EERENBERG). 1911,. MARtJEAWA. The. Dec.. 147,. that･. as. horn･. NISHIKAWA. J6RGENSEN. the. on. resembles. turns. then. macroceros. &. p･. species. rounded. Length,. oⅠくAMURA. AB丘1927,. this. 0ffManazuru,. Ceratium. and. 143-145･. 1906,. proximal. Dimensions:. laterally. concave･. 235c.. apical. list along. antapical. (KARSTEN). Protuberans. KARSTEN. base,. the. Loc.. two. slightly horns. 70-78〟･ ; transdiameter, Aug･ 10, 1956･ 27, 1955;. 67, pls. 7-8,丘gs･. so. or. straight. ridges. several. ∀ar.. p.. is not. to. almost. in. triangular. 500-560〃. 308,丘g.. p.. the. broadly. Epitheca. Nov.. aspects,. at. parallel. are. protuberans. species. rather. 179a-d･. mid-body. Length,. general. 26,丘g,. species･. massiliense. tripos. 18･. b.. 0ffManazuru,. WooD. sideways. 48a,. There. J6RGENSEN. Fig･. 78･ pl.. Of. at. Ce,atium. Pl･ VI,. 140-142･. The and straight･ turning the base, then. Dimension:. In. 50,. p.. p･. 131. long. very. forward･. c.. pl.. margln. postero-laterally. 22.. and. 306.. p.. Base. 1iquely. 1,丘g･. long-horned. large,. rated. postero-. half. is marked. 48-55. J6RGENSEN･. pl. 7,丘gs･. 85,丘g1. 430,丘g.. p.. WooD. Apical. 9,. p.. 1920,. ABI王1927,. 66,. p.. 1920,. J6RGENSEN. this. curved distal. and. 1955.. (GouRRET). p.. 1912,. oKAMURA. 21.. of. /上; tranSdiameter･. 26,. Dec.. massiliense. J6RGENSEN. outline.. 240-350. Length,. 0ffManazuru,. Ceratium. A. strongly in the. forward. projecting. forward. obliquely. born. with base. The. epitbeca･ horn is. antapical. surface. outline,. ridges･. Dimensions:. 20.. The. in. as. curving. projecting. horn･. apical. long. left antapical. but. 174-1761. triangular. right but. half,. proximal The half.. proximal. parallel. The. oblique･. in. outward in distal !n. 83,figs._. p･. Epitheca rounded species･ as Hypotbeca almost sides･. weakly. outward 1aterally. 1911,. J6RGENSEN. (J6RGENSEN). medium-sized. obliquely. b･. 130a,. 300,丘g･. p.. c. intermedium. Kato. projecting. thirds with. being a. ser-.
(9) On. A. of Ⅱlid-body. and. and. its base. The. two. postero-laterally. to. horns base,. longer. Dimensions: Loc･. Length,. Off. Ceratium. 1911,. 1954,. C･ tripos. 64, pl.. p.. 47,. p.. 310,丘g.. p,. 3; Åug.. margin slender,. centre. slender, distal. of. epト. projecting half. being. Dimensions: Loc･. 21,丘g.. 162a,. 1907,. Length,. Off. Ceratium. b.. 49,丘g･. pl･. 1911, 1920,. MARUKAWA. WooD. 75,. this. j7agelllferum. 1954,. p.. 311,丘g.. this. of. or. 55. shorter. and. more. 〟.. Pl. VI,. Fig.. 19a,. b.. b.. 23,丘g.. 169a,. 1906,. KARSTEN. is long. c.. 22,丘g.. pl.. 316.. The. slender and straight, base, then gradually. the. than. epitheca horns. are. forward,. curving. broad.. are. projecting distal. their. Epitheca. and. three. usual horns. antapical. than. rather. lower. hypotheca. but. each. rather. the. resembles. 239a.. concave.. weakly. KoFOID. 159a,. 22,. pis,. species. in outline,. triangular. species. b.. 85.. 48,. p.. are. lla,. 10, 1956.. p]. 9,丘g.. 96,丘g.. p.. b, pl･ 51,丘g.. 26a,. transdiameter,. (EERENBERG). p,. 1920,. Mid-body. straight. Åug.. trichoceros. C･ tripteris. 420〟;. Manazuru,. J6RGENSEN. 25.. Fig.. 237.. KARSTEN. macroceros. ”.. 138.. 7,丘g.. pl.. 55-70. Pl. VII,. horns, aspects general of mid-body and but the antapical horns of this species backwards near strongly curving the base.. its. rounded. base. margln. long,. extremely. at postero-laterally half being parallel. other.. Dimensions: Loc･. Length,. 1911,. tripos. 2)ultur. C･ triI･os vultur MARロEAWA. KARSTEN, var･. 1920,. chain-forming that. 1907,. sumatrana p.. 153, pl.. 3; Aug.. J6RGENSEN. 55-75. /A.. 10, 1956. Pl. VII,. Fig.. 24.. 154.. 48,丘g.. KARSTEN. 46, pl. 21,丘g.. species, C･ of vultur･. July. angulatum. 73, pl. 8,丘gs.. p.. tranSdiameter,. Hatsushima,. forma. sumatranum. J6RGENSEN. 450-700ノ上; &. 0ffManazuru. Ceratium. resembles. Base. 10, 1956... former. A. Epitheca. long,. the. transdiameter,. ” ;. In. C･. the. and. forward,. curving. (KoFOID) J6RGENSEN.. 1920,. WooD. 25･. from. long. very. then. July. dej7exum. JdRGENSEN. with. broad･. than. left side. the. are. 370-450. Manazuru,. MARUEAWA. 24･. 19. divergent.. slightly. 23･. deviated. the. at. Mid-body. almost. antapical. (Dinoflagellata). little shorter hypotheca･ than Apical horn is very straigbt･. a. ontline,. oblique. straight,. Ceratium”. ". of. species･. in. triangular. theca･. Species. long-horned. very. rounded. and. The. 14a,. 1907,. b. pl.. 48,fig. 15a,. b.. 163a-e.. The as shape of mid-body well as apical Mid-body in outline･ triangular rounded. horn Epi-.
(10) theca. small. Girdle horn. Kato. N.. 20￣. low. and. dorsal. the. on. straight,. at. right. projecting forward,. is thick mid-body Dimensions:. and. solid,. Length,. Loc.. AB丘,. Report. T.H.,1927. Fauna. Protozoan Ser.. 4th. 2). are. (length. 〟.. 6). E” 1911.. ScHARNE.. Leipzlg.. in. 1906. fsee. Tiefsee. (Japanese). Japon. Coast.. nese. 1912.. 13) Bull,. 14). PA口LSEN,. et. 16). WooD,. de. la. Plankton of. An. naturwiss.. Annales. du. Mus6e. der. Gattung. Ceratium. Danish. 1908-10. Re-. Oceanographic to. the. Mediterranean. 1-110. des. Meeres. antarktischeh 1898-1899.. den mach Ergebn.. Wissensch.. MaD,. Atlantischen. Ozeans. Wissinsch.. mach Ergebn.. den d.. Material. der. deutsch.. 1Tie-. Wissensch.. Ergebn.. d.. deutscb.. List Bull.. Japan.. Diagrams. some. new. and de. L'inst.. of. the. Species. of. No.. Planktonorganisms.. from. Copepods. Oceanographique.. 884.. ⅠⅠ,Peridineae. List. A. T., 1904.. Ceratium. of. in. Annot.. Japan.. Organisms. Plankton. und. List. annotated. of Plankton. Microorganisms. of. the. Japa･. ⅤⅠ, 2.. Ibid.,. Pbysiol.,. and. und. Ⅴ, 191.. E.∫.Fリ1954.. Marine. the. on. Expedition. 1898-1899.. NTSIiIEAWA,. G., 1883.. PoucliET,. Marseille.. Monographie. Phytoplankton.. Explanatory. 0っ1908. Kiel. Math.. Tokyo.. FisbりSei.. XVIII,. 15). 1921a.. K., 1907.. OKAMURA,. de. Report. des. lndiscben. Waters. K., &. Zool.. Univ.. ⅠⅠ,220-548.. 1921b. OKAMURA,. Tohoku. the. on. Imp.. ⅠⅠ,139-219.. northern. 10). Notes. 31. 8.. Expedition. Expedition. Das. H.,. the. Rep.. ⅠⅠ,1-138.. Phytoplankton. Exped.. MARUKAWA,. Sci.. Peridineen.. golfc. Kurze. Ceratia.. Tiefsee. Tiefsee. 1907.. du. Ⅰ,No.. zoolリt. Ceratien. Eine. Exped.. Das. der. Kentnis. zur. Oceanographic. Danish. Exped.. 8). Bay･. Mutsu. Peridiniales.. lcs p6ridiniens. Die. Tiefsee. dcutschen. 12). 1.. 96-144.. deutschen. der. 7). ll). Bay.. Mediterranean the. deutsch.. Surveyof. theBiological. Seas. Vol. II, Biol” and Adjacent Das KARSTEN, G., 1905. Phytoplankton terial. 9). Sur. J6RGENSEN,. port. 465〟);. ures. Marseille,. de. natur.. 1920.. individual,. of terminal. 9, 1956.. Mutsu. XX.. Pり1883.. 5). horn antapical forward･ Left one. /上.. Beitrage. aus口ngarn.. Go口RRET,. Right. girdle･. ⅠⅠ.383-438.. Biol.. d'hist.. 4). of. Gりjunリ1905.. ENTZ, Ber.. 3). of. Apical. middle.. obliquely base turning and then rapidly divergent･ The markedly surface of so near the bind margin･. Literat. 1). the. near. the. at. especially. June. 0ffManazuru,. convex･. Strongly. turning. 100-105. 64-67. transdiameter,. the. with. then. postero-laterally horns the two. margln. side. posteriorly. angle. and. postero-laterally. obliquely. right. is curving. side. nearly. projecting is also. its. triangular,. Invest., =. from. Bonito丘sbing. Ground.. Rep.. Imp.. Jap.. Ⅰ. in. peridinales=. BRANIDT. u.. ApsTEN.. Nordisches. Plankton,. Leipzlg. Contribution_a. l'histoire. des. C･ilio-flagel16s.. Journ.. de. l'anat.. ⅩⅠⅩ, 399. Dino月.agellates. Freshwater. Res.. in the Australian. Ⅴ, 17ト351.. Region.. Australian. Journ..
(11) ExplanatiorL. GouRRET,. Of. Ventral. Fig.. 1,. Ceratium. gram'dum. Fig･. 2･. Ceratium. candelabrum. (EIiRENBERG). Fig.. 3,. Ceratium. candelabrum. var.. Plate. view･. STEIN,. depressum. Ill. (× 550) Ventral. (PoucHET). (× 440) view･ Ventral J6RGENSENI. view･. (×440) Fig.. Fig. Fig.. DuJARDIN･ (EHRENBERG) (× 430) of another specimen. DuJARDIN･ 5a, b, c. Ceratium fusus (EERENBERG) 6a, b. var･ seta Ceratiumfusus (EIiRENBERG) Ventral of the same specimen. (× 240) view 4a,. b.. Ceratium. Fig.. 7.. Ceratium. Fig.. 8a,. b.. 420). furca. l･ennatum. Ceratium. sb.. a,. KoFOID･. Ventral. Ventral. view･. view･ b,. Dorsal. Ventral. a,. Ventral. view.. view,. J6RGENSEN.. a,. b, Dorsal. view. (× 240) Dorsal. view･. b,. (× 240) view. of. the. same. specimen.. (×.
(12) Kato. Sec.. :-Ceratium.. ⅠⅠ.Plate. III. リ. 億. 4a. A. F. i･･ 賢 6a. ･.,:=':I;i: ･:i:1.:”t. ･Cql･･t.t''. 6b 8a. 8b 4b. 5a. Kato. del.. 5b. 5er.
(13) lkplanatiolt Fig.. 9･. Fig.. 10a,. Ceratium b,. Distal Fig,. lla,. b･. c･. GouRRET.. pentagonum Ceratium. half. of Ceratium. γentral. sp･. a,. IV. view. CLEVE.. (GouRRET) born. (× 220) c, Ventral γentral view･ (× 220) b,. extensum. antapical. Plate. Of. (× 440) a,. Ventral. view.. (× 240) (× 500). view of mid-body. Ventral view of mid-body,. b,. (×. 440) Fig.. 12a,. b.. Ceratium. tripos. (0.F. MiiLLER). Fig.. 13a,. b･. Ceratium. tripos. forma. 440). neglecta. NITZSCI‡.. (OsTENFELD). γentral PAULSEN,. view.. (× 300) Ventral. view.. (×.
(14) Kato. Sec, ⅠⅠ.Plate. :-Ceratium.. l. ●. ●l. ● ●. 12a. 10c. 9. 12b. ∨ ノ ”. 嘩ま llb. ” 13a. ン∈=. 10a. Kato. lob. del.. lla. 13b. IV.
(15) Explaltation. F. g.. 14.. Ceratium. horridum. F. g.. 15.. Ceratium. limulus. F. g.. 16a. b.. F. g.. 17.. Ceratium. Ceratium. GRAN.. Plate. Ventral. GouRRF.T.. platycorne. gibberum. of. VON. GouRRET.. V. view.. Ventral DADAY.. γentral. (x 440). (x 440) view. γentral view. view.. (× 440). (× 440).
(16) Kato. :. ⅠⅠ,Plate. Sec. -Ceratium.. gL. P,苛. a. ,I,I/ で. 14. 16a. 15. 過. 転≡+ 17. Kato. del.. ど 16b. V.
(17) Explanatiolt Fig.. 18･. Ceratium. Fig.. 19a,. b･. Fig.. 20･. Fig.. 21･. Ceratium. Fig.. 22･. Ceratium. view Ceratium. Phtc. VI. Ventral (GouR且ET) J6'kGENSEN. (× 180) view. KoFOID. (ERRENBEkG) a, Ventral view. (× 80) b, of mid-body. (× 220) var･ massiliense protuberans J6RGENS丘N. Dorsal (KARSTEN) view. massiliense. Ceratitm. γentral. Of. trichoceros. (×200) arietinum bucephalum. CLEVE･ var･. γentral heterocamptum. view･. (不440) J6RGENSEN･. Ventral. view･. (× 440).
(18) Kato. Sec. ⅠⅠ.Plate. :-Ceratium.. 18. 19b. 19a 20. クヲ. ･g1. ･%.:. 21. Kato. del.. 22. VI.
(19) ExplarLatiorL. Fig.. 23.. Ceratium. macroceros. Fig.. 24.. Ceratium. sumatranum. Fig.. 25.. Ceratium. dejiexum. Of. (EHR･=NBERG) forma. Plate. CLEVE･. angulatum. (EoFOII,) J6RGENSEN.. VII Ventral. J6RGENS･ENI Dorsal. view. Dorsal. view.. (x 440) view･. (× 440). (×. 240).
(20) Eato. :-Ceratium.. Sec.. g. ヽ･●. 25. Eato. del.. ⅠⅠ.Plate. VII.
(21)
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