Some
Miocene Marine Fossils from the Kii Peninsula,
Wakayama Prefecture, Japan
Jiro Katto
(Ｄｅｐａｒtｍｅｎt ｏｆ Ｇｅｏｌｏｇｙ Ｆａｃｕlり０／ Ａｒtｓ ａｎｄ Ｓｃｉｅｎｃｅｓ Ｋｏｃｈｉ Ｕｎｉｖｅｒｓitｙ Kocfii， Ｊａｐａｎ)
Introduction
This is the sixth contribution to the Miocene marine trace fossil and problematica fauna from the Shimosato Formation distributed in the tip area of the Kii Peninsula, Wakayama Prefecture, Japan. In the previous articles (Katto, 1974), descriptions and illustrations were presented on some tubular, rod, branching and spiral structures, and also on ａ very rare pellet-cord structure.
The stratigraphic position of the Shimosato Formation in the geologic column of the tip area of the Kii Peninsula (Wakayama Prefecture side) and ａ short review of the hitherto recorded fossils from the area have been mentioned in the previous articles (see bibliography) and repetition will be avoided at this place.
In the present or sixth contribution to the fauna of the trace fossilsand problematica from the tip area of the Kii Peninsula, the undermentioned four genera and species are described and figured,
namely:- ＼. Kiiｖｅｒｍｕｓｓahiｕｒａｅｎｓiｓ．n.gen. ｎ. sp. (Fig. 2) Loc. Sabiura, Kushimoto-cho,
２.Ｓ ｃａｌａｒitｕｂａｆｅｉｉｅｎｓiｓ，n.sp. (Fig. 1) Loc. Takatomi, Kushimoto-cho,
３，Ｓａｂｉｕｒａｃｏｌｉtｅｓ･ｗａｋａｙｏｎｉａｅｎｓiｓ,n. gen. n. sp. (Figs. 3, 4, 5) Loc. Takatomi, Kushimoto-cho,
4. Ｈａｌｉｍｅｄａsp. (probably new to science) (Figs. 6, 7, 8) Loc. Takatomi, Kushimoto-cho.
Acknowledgments
The writer is indebeted to Dr. Kotora Hatai, Professor Emeritus of the Tohoku University and Director of the Saito Ho-on Kai Museum of Natural History, both in Sendai, Miyagi Prefecture, for his kind suggestions, continued encouragement, and reading the manuscript. Thanks are due to Mr. Yukio Sako of Kushimoto･cho, Wakayama Prefecture, for kindly donating specimens to the writer's study and also for his guidance in the field to the fossil localities.
TheTrace Fossils and Problematica
There is at present no standard systematic classification for the trace fossils and
48 Res. Rep. Kochi Univ Vol. Nat. Sci. No. 6
matica, and therefore, the fossils treated in this article are arranged for the sake of convenience in the order mentioned above.
Family uncertain
Genus ＫｉｔＴｊｅｒｊｎｕｓKatto, n. gen.
ＬＨａｇｎｏｓiｓ:- Body elongate cylindrical, segmented throughout. Segments numbering about four per five millimeters length, each broac!er than their interspaces, strong and rounded on top. Body exceeds １０ cm in length, 7-13 mm in thickness or diameter. Setae and other organic structures obscure.
(:ｊｅｎｏり1）ｅ：一KiiｖｅｒｍｕｓｓabiｕｒａｅｎｓiｓKatto, n. sp.
Ｔｙｐｅｌｏｃａｌｉり， Ｆｏｒｍａtｉｏｎａｎｄ Ａｇｅ : − Sabiura, Kushimoto-cho, Wakayama Prefecture. Shimosato Formation. Miocene.
Ｒｅｍａｒkｓ:- The genotype， Kiiｖｅｒり･ｌＵＳｓahiｕｒａｅｎｓiｓ,ｎレgen. n. sp･, whether represented by three clustered specimens or only two individuals is difficult to determine owing to that they are preserved as worn, curved bodies on the surface and extending into the dark colored siltstone. Of them, one large individual overlapping another large one, and the . smallest, situated in the depression circumscribed by the larger two, represent the present species. But the small one in the depressed area may be the smaller part of the larger specimen at the surface, whereas the large one overlapping part of another large individual may represent a different body-specimen. Here it is interpreted that the closely curved large individual overlapping part of another specimen represents one specimen, arid that, the one in the depressed area is ａ
continuation of the larger curved one at the surface. Thus, there are two specimens at hand, in close contact ； they are judged to represent the same species. Although both specimens are with worn dorsal surface, it is evident that they were originally strongly segmented throughout their length. The specimens are compressed laterally and exhibit the segments only in part.
KiiｕｅｒｍｕｓｓabiｕｒａｅｎｓiｚKatto, n. sp｡ PI.1, fig. 2.
￡)ｅｓｃｒiptｉｏｎ: − χVorm body laterally compressed, variously curved, rather thick, originally cylindrical･elongated, segmented throughout exposed body ； segments low, rounded on top, broader than their interspaces, number about four per five millimeters distance, interspaces of segments narrow ； body measuring about １３ mm at broadest part, ７ mm at well rounded narrowest part in depressed area ； body exceeding １０cm in length as both anterior and posterior parts not exposed ； segments projecting at lateral surface of compressed specimen.
Ｔｙｐｅ ｈｏｃａｌｉり，ＦｏｒｍａtｉｏｎａｎｄＡｇｅ:- same as for the genus mentioned above.
Ｒｅｍａｒkｓ :-The fossil marine worms represented by trail,ｅχcreta, tube and body, hitherto l
described from the Cenozoic rocks of the Japanese Islands are as follows : − 1.ＴｏｓａｉｏｒbiｓfeattｏｉHatai and Kotaka, 1961. body
Loc. Miocene Kanayama Formation. Shirahama, Wakayama Prefecture. 2. ＳａｎｈｏｎｇｉｃｏｌａｎａｋａｇａｖｕａｉHataiand Masuda, 1973. body
Some Miocene Marine Fossils from the Kii Peninsula, Wakayama Pref. （Ｋ人TTO)
49
Prefecture.
!＞. ＴｏｓａｌｏｒbiｓｈａｎｚａtｖａｉKatto,1960. body
Loc. Eocene Muroto Formation. Gyotozaki, Muroto City, Kochi Prefecture. ４，ＴｏｓａｌｏｒbiｓｐｅｃｕliaｒiｓKatto, 1960. body
Loc. Eocene Muroto Formation. Gyotozaki, Muroto City, and, Oligocene Misaki Formation, Tosa-Shimizu City, both in Kochi Prefecture.
5，Ｔがｒebellina ihikokｕｅｎｓiｓKatto, 1960. tube
Loc. Eocene Naharigawa Formation. Kannoura, Toyo-cho, Aki･gun, Kochi Prefecture. 6.ＮｅｒｅｔtｅｓtｏｓａｃｎｓiｓKatto,1960. body
Loc. Eocene Muroto Formation. Hanezaki, Muroto City, and, the same formation at Jadani, Kitagawa-mura, Aki-gun, both in Kochi Prefecture.
'7，Ｎｅｒeitｅｓ刀lｕｒｏtｏｅｎｓiｓKatto,1960. body
Loc. Eocene Muroto Formation. Hanezaki, Muroto City, Kochi Prefecture. Eocene Naharigawa Formation, Kaname, Shishikui-cho, Kaifu-gun, Tokushima Prefecture. 8，Ｔｏｓafiel，TiintheｓｃｕｒｖａはKatto, 1960. excreta
Loc. Eocene Naharaigavva Formation. Kaname, Shishikui-cho, Kaifu-gun, Tokushima Prefecture.
9. SakこoitｅｓｙｕｋｉｏｉａKatto,1974. excreta l’
Loc. Miocene Shimosato Formation. Arafune, Tawara, Higashi-Muro-gun, Wakayama Prefecture. ’｀
10Kりia kiienｓiｓKatto, 1974. tube
Loc. Miocene Shimosato Formation. Arafune, Tawara, Higashi-Muro-gun, Wakayama Prefecture.
＼＼. ＳｐｉｒｏｒａｐｈｅｃｏｎｃｅｎtｒｉｃａKatto, 1964. excreta
Loc. Eocene Naharaigawa Formation. Kannoura, Toyo-cho, Aki-gun, Kochi Prefecture. ｎ，ＨｅｈｎｉｎtｈｏｐｓiｓｔりｏｅｎｓiｓKatto, 1964. excreta
Loc. Eocene Naharigawa Formation. Kannoura, Toyo･cho, Aki-gun, Kochi Prefecture. 13. Undetermined excreta Katto, 1964. excreta
Loc. Eocene Muroto Formation. Tsuro., Muroto City, Kochi Prefecture ( = Toyoner？μＥｊ ｌｉａｎｎｏｕｒａｅｎｓiｓ）.
14.Ｎｅｒeitｅｓ ■)ｎｕｒｏtｏｅｎｓiｓmiｓａｋｉｅｎｓiｓKatto, 1964. trail
Loc. Oligocene Misaki Formation. Chihiromisaki, Misaki, Tosa-Shimizu City, Kochi Prefecture.
15，ＮａｎｋａｉtｅｓｋｏｃｈｉｅｎｓiｓKatto,1964. trail
Loc. Eocene Shimizu Formation. Ochikubo, Tosa-Shimizu City, Kochi Prefecture. χ6，Ｔｏｙｏｎｅｒeitｅｓkant,loｕｒ･ｅｎｓiｓKatto,1964. excreta
Loc. Eocene Muroto Formation. Gyotozaki, Muroto City, Kochi Prefecture. 11. Ａｋｉｎｅｒei￡ｅｓｋａｎｎｏｕｒｅｎｓiｓKatto,1964. excreta
Loc. Eocene Naharigavva Formation. Kannoura, Toyo-cho, Aki-gun, Kochi Prefecture. １８Ｂａｌａｎｏｇｌｏｓｓｕｓ-likeexcreta Katto, 1960. excreta
Loc. Oligocene Misaki Formation. Kawajiri, Misaki, Tosa-Shimizu City, Kochi Pfe- fecture.
50 Res. Rep. Kochi Univ.
Vol. Nat. Sci. No. 6
Loc. Miocene Bessho Formation. Minamihana, Sakagi-mui･a, Hagishima-gun, Nagano Prefecture.
20・ Ditｒｕｐａ miｙａｚｉ
Loc. Miocene Udo Formation. Kagamisu-toge, Kiyotake-cho, Miyazaki･gun, Miyazaki Prefecture.
ｌxヽTibikoia ｆｕｄｏｅｎｓiｓHatai, Kotaka and Noda, 1973. excreta
Loc. Pliocene Kogota Formation. Fudo, Kogota-machi, Miyagi Prefecture｡
Compared with the marine worms represented by fossil body or trail, the present one from the morphology of the segments and their characteristics as well as the shape of the thick body, some similarity is noticed with the segments imprやssed on the trail of the Upper Cretaceous Ｈｉはchia ｎａｋａｍｉｎａtｏｅｎｓｉａ Hataiand Noda (1972) from the coast at Hiraiso,
Nakaminato City, Ibaraki Prefecture, but the present one can be distinguished from that species by the more closely developed segments and narrow body. The fossil worm body called ＳａｎｂｏｎｇｉｃｏｌａｎａｋａｇａｘｖａｉHataiand Masuda (1973) from the Pliocene Omori Formation cited in the list above can be distinguished from the worm body described in this article by the finer segments and different shape of the body｡
ＴｏｓａｌｏｒhiｓｈａｎｚaiｕａｉKatto (1960) from the Eocene Muroto Formation at Gyotozaki given in the list resembles the present fossil in the general thickness of the body, but the segments
are narrower with broader interspaces compared with the worm from the Miocene Shimosato Formation. ・
The thick cylindrical body with strong segments serve to remove the present fossilmarine worm from the genus ＴｏｓａｌｏｒbiｓKatto(1960), and the same characteristics show that it can not be classified with any of the known fossil worms recorded from the Cenozoic rocks of the Japanese Islands or with any of the ones described by Howell (1962). For the reasons
mentioned and because it is a characteristic worm it should be given ａ name from the view of biosystematic classification. The name of the family to which it may belong is uncertain at present. The generic and specific names are taken from the type locality of Sabiura in the tip are of the Kii Peninsula.
Family uncertain
Genus Ｓ ｃａｌａｒiｔｕｈａWeller, 1899 Scalaｒitａｂａ kiienｓiｓ Katto. n. sp. PI. 1, fig. 1.
Ｄｅｓｃｒiptｉｏｎ:− Burrows cylindrical in shape, measuring about ７ mm in diameter, variously curved along extension, marked by transverse flaring ridges separated from one another by distances of ｌ mm t０３ mm in general and up to about ７ mm in maximum, each posterior one overlapping adjacent anterior one. ridges separated at irregular distances, each one more or less funnel shaped.
Ｌｏｃ ｢iり，Ｆｏｒｍａtｉｏｎａｎｄ Ａｇｅ:− Takatomi, Kushimoto-cho, Wakayama Prefecture. Shimosato Formation. Miocene.
Ｒｅ･ｍａｒkｓ:-The genus ＳｃａｌａｒitｕｂａWeller is stated by Hantzschel (1962, p. 215, fig. 133, 4) to have been established upon Ｓｃａｌａｒitｕha i･inｓｓｏｕｒｔｅｎｓtｉ Kind町hookfrom the Lower
Some Miocene Marine Fossils from the Kii Peninsula Wakayama Pref. (Ka･r・Ｏ） 51
Mississippian of Missouri State, U. S. A. Comparing the Miocene fossil with the figure and description of Ｓｃａｌａｒitｖｂａｍｉｓｓｏｕｒｉｅｎｓiｓgiven by Hantzschel （Op. cit. ) it is noticed that the Miocene specimen is most similar to the one illustrated in the lower half of Hantzschel's figure. The flaring ridges of the present specimen are of larger diameter and much less uniformly arranged, and these features serve to distinguish the present one from the Lower Mississippian genotype species mentioned above.
Family uncertain
Genus SabiiぼａｃｏｌｉtｅｓKatto,n. gen.
Ｄｉａｇｎｏｓiｓ;-Orbicular body with central disc and radially developed ribs separated from one another by narrow interspaces. '･
Ｔｙｐｅ Ｌｏｃａｌｉり，ＦｏｒｍａtｉｏｎａｎｄＡｇｅ:- Takatomi, Kushimoto-cho, Wakayama Prefecture. Shimosato Formation. Miocene.
Sabiｕｒａｃｏｌｉtｅｓｘｖakり。ｎａｅｎｓiｓKatto, n. sp｡ PI. 1, figs. 3, 4, 5.
Ｄｅｓｃｒiptｉｏｎ:-The type specimen (fig. 5) has orbicular body, somewhat compressed by pressure subsequent to burial, with central disc-like appendage, radially developed ribs, rather strong and separated by narrow interspaces ； probably about half embedded in matrix. The original shape is considered to have been orbicular even though only ａ part is exposed on the surface. The orbicular specimen measures about ３４mm in diameter, about １３mm in diameter of central disc, each radial rib measures from ３ mm t０ ６ mm in minimum and maximum widths, respectively, being narrowest at central disc. The interspaces of radial ribs measure a little less than ｌ mm and appear to be deep. The number of radial ribs amount to about 16, although not definite because of them being compressed, somewhat worn and destroyed in part. The central disc seems to have had ａ hole or opening measuring about 5−６ mm in diameter in the center. In preserved condition the radial ribs or rays show no evidence of ornamentation and thus are judged to have been smooth.
Ｒｅｍａｒkｓ:- The present fossil, especially the ribs radiating from ａ hollow center, show ａ remote resemblance with ＣｏｒｏＴｉｄｉａｄｅｍａ(Linnaeus), a cirriped known to｢ａ attach to whales (Pilsbry, 1916 ； Newman, Zullor and Withers, 1969; Hatai, 1939) and thus have ａ wide geographical distribution. But, the present fossil can be distinguished from Ｃｏｒｏｎｕla and its species by the formation and the number of radial ribs or rays, and also by the features of the central opening or hollow. Also the characteristic features of Ｃｏｒｏｎｕlaand its species are different from those of the present species.
Another group of marine fossils that may have some similarity with the present fossil are the members of stemless crinoids. However, the structural features of the crinoids (Shrock and Twenhofel, 1953) distinguish them from the present fossil.
The trace fossil known as Stellascolites Etheridge (1876) that was described and figured by Hantzschel (1962, p. 218, fig. 133, 2) from the Ordovician of England shows a distant rｅ･semblance with the present fossil in the possession of ａ central hole from which rays radiate. Hantzschel (Op. cit.) describedStellaｓcolitｅｓ ａsパＲａdiate or stellate disklike impression with
52 Res. Rep. Kochi Univ. , Vol. 24,･Nat. Sci., No. 6
16 rays of nearly equal length radiating from central round space, becoming broader at their extremities which are not clearly defined ； diameter 20 t0 25 ･ｃｍ”. The genotype species is Ｓ.Γadiatu了巳theridge from the Ordovician of England｡
The description ｏｆ Ｓtellaｓcolitｅｓnearly fitsthe present fossil eχcept for not being orbicular, of larger diameter, and different structure of the radial rays. At firstit was thought probable that Stぶａｓcolitｅｓmay represent ａ negative impression of only half of an originally orbicular specimen like the present fossil, and would therefore, be disklike with rays radiating from ａ central space or hollow. But, comparison of the morphologic features oi Ｓtellaｓcolitｅｓwith those of the present fossil readily serves to show that the differences between the two are of tａχonomic significance. ｡ For the reasons mentioned above the present fossil can not be identified with the genus Ｓ ｢,laｓcolitｅｓ,and ａ new name should be proposed for the present fossil because it is not
referable to any known genus and also because it is a characteristic fossil. For the present one the name of Ｓａｂｉｕｒａｃｏｌｉtｅｓｗ硫りａｍａｅｎｓiｓｎ.・gen.n. sp. is proposed｡
Two other specimens, one conveχ (PI. 1, fig. 4) and the other concave (PI. 1, fig. 3) are in the collection of fossils from the tip area of the Kii Peninsula. Both have ａ round central space or hollow from where there extend radial ribs or rays. Their diameters are about 17 mm for the concave specimen and about 19 mm for the one of conveχ shape, the diameter of the central space or hollow is about 7 mm for the latter specimen and about ３ mm for the former one. The latter or conveχ shaped specimen is from Sabiura and the former is from Takatomi, both in Kushimoto-cho. The radial ribs or rays of both specimens number
about 16， but those of the concave shaped specimen are broader than their interspaces, whereas those of the convex shaped specimen appear to be narrower than their broad interspaces｡ Both specimens are not so well preserved and so far as observable their radial ribs or rays show no kind of ornamentation either transverse or longitudinal and thus may have been originally sｍｏｏth｡
Since the two specimens (concave and convex) are more or less similar to Ｓａｂｉｕｒａｃｏｌｉtｅｓ ･ｕia.kaｙａｍａｅｎｓiｓin number of non-sculptured radial ribs 9r rays, presence of ａ central space
or hollow, and general morphological structure, they are tentatively included in that genus until better preserved ones are found｡
The kind of animal responsible for construction oＴ Sabiｕｒａｃｏｌｉtｅいsunknown at present. However, it is evident that the genus was a habitant of shallow marine waters probably of warm･temperate to subtropical as judged from the kind of invertebrate fossils that occurred in association with them.
Family Codiaceae Lamouro'ux, 1812 Genus ＨａｉｔｍｅｄａLamouroux, 1812 Ｈａｌｉｎｉｅｄａsp. undet. (n. sp.?） PI. 1, figs. ６， 7, 8.
The marine branching plant is represented by only part of the original plant, that is to say, the fossil consists of two rather well preserved detached fronds and about five or more detached fragmental parts of dense fronds. Although not complete, the densely arranged fronds
Pref. (Katto)
5ろhere identified with the ｇｅｍｉｓＨａｌｉｍｅｄａLamouroux, 1812 (Johnson, 1964), a marine alagal genus of rather wide distribution, and according to Johnson (1964, p. 37),“The genus has a geological range extending from the Cretaceous to Recent. It is abundantly represented by numerous species in tropical and warm･temperate seas. Locally the plant may grow in enormous numbers and literally cover large areas of shallow sea bottom”.
Ishijima (1951) has figured the fronds of four species of the genus Ｕａｌｉｍｅｄａand listed eight species. He also mentioned that there are known eight species and 11 forms oT Ｈａｌｉｍｅｄａ， and aside from Ｈａｌｉｍｅｄａ tｕｎａ(Ell.and Sol.) H.ｃｕｎｅａｉａHering and Ｈ. ｉｎｃｒａｓsａtａ Lamou-roux, all others are of tropical distribution.
Although the species name of Ｈａｌｉｖｉｅｄａ ＼ｎthe present collection was not identified, the occurrence of the genus in the fossil fauna from the Shimosato Formation is interesting because of its importance for interpreting the bathymetrical condition of the seas in which the fauna once lived, and also because the occurrence of dense fronds from the younger Cenozoic rocks of Japan is not ａ common case.
The specimens exhibit two branches, one forked at acute angles and the other single as it may be ａ detached part of some other branch. The forked branch gives off two branchlets,
each provided with triserial development of elongate, bluntly oval shaped, more expanded above than below, nodes. These are developed somewhat irregularly and extend alternatUy and successively upward triserially and outwards at acute angles, making as ａ whole, a complex noded frond. Each node measures up to about 4−5 mm in height, and up to about ３ mm in width, and each one is rather thick, measuring about ２ mm, yet developed rather flatly in lateral view and as mentioned above in front view.
The general features of the fossil specimens just described resemble Ｈａｌｉｍｅｄａｇｒaciliｓ Harvey formａ tｙｐｉｃａBarton, that was illustrated by Ishijima (1951, p.65, fig. 1), but the present fossils can be distinguished from the mentioned species by the more oval shaped nodes, successive tri･serially alternating aspect of the nodes in upward extension. The present fossil also resembles but is distinguishable from ＨａｌｉｍｅｄａｃｕｎｅａtａHering figured by Ishijima (1951, p. 64, fig. 2) by -the more acute branching and also by the more acute development
of the successive triserial alternation of the nodes in upward extension.
Because specific identification of the fossil specimens was not made, it will be merely treated ａｓ Ｋａｌｉｍｅｄａsp. undet. in the present article. However, one of the specimens (PI. 1， fig. 7) shows some similarity with ＡｍｐｈｉｒｏａａｈｅｒｒａｎｓYendo from the sea-area of the Pacific and Japan Sea sides of Central Japan (Segawa, 1974, pi. 41, fig. 327) and also with the genus ゐdilator. But, owing to the lack of sufficient material, the present specimens are here recorded in the broad meaning of Ｈａｌｉｍｅｄａ ａｓit is also very similar to the Ｈａｌｉｍｅｄａ species mentioned above.
As pointed out by Johnson (1964, p. 37) and Ishijima (1951, p. 64) the genus J-[aliineda is specifically abundant in tropical to warm temperate seas, and typically a shallow water inhabitant. Thus, its fossil representatives may also be interpreted to have thrived under a similar physical condition.
Ｌｏｃａｌｉり,Ｆｏｒｍａtｉｏｎａｎｄ Ａｇｅ-.- Takatomi, Kushimoto･cho, Wakayama Prefecture, Shimo･ sato Formation, Miocene.
54 Res. Kochi Univ., Vol.
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Katto, J., 1964-Some Sedimentary Structures and Problematica from the Shimanto Terrain of Kochi Prefecture, Japan. Res. Repts. Kochi Univ. voし･13, Nat. Sci., no. 6, p. 45-56, 8 pis. Katto, J., 1973-Trace Fossils from the Shimanto Terrain, southern districtof Shikoku. 1. Atlas of Japanese Fossils, 2 plS･， 7 figs･，1 table.（ｉｎJapanese)
Katto, J., 1973-Problematica and Sedimentary Structures of Tosa. Geol. News, Geol. Surv. Japan, ｎ０. 231, p. 58-65, 31 figs.（ｉｎJapanese)
Katto, J･， 1974-A Pellet-cord from the Cenozoic (Miocene) of Higashi-Muro･gun, Wakayama Pre- fecture, Southwest Japan. Res. Repts. Kochi Univ., vol. 23, Nat. Sci., no. 1, Contri. No. 57, p. 1−7， 1 fig･， 1 pl･
Katto, J. , 1974-A Fossil Tubular Structure from Wakayama Prefecture, Southwest Japan. Ibid., Nat. Sci., no. 2, Contri., No. 58, p. 9-12, 1 ng･，1 p1.･
Katto, J., 1974-Some Spiral Structures from Wakayama Prefecture, Japan. Ibid., Nat. Sci., no. 3, Contri. No. 59, p. 13-16, 3 figs･
Katto, J. , 1974-A Fossil Branching Structure from the Cenozoic Deposits of Wakayama Prefecture, Japan. Ibid., Nat. Sci., No. 4, Contri. No. 60, p. 17-20, 2 ngS･
Katto, J･, 1974-Some Tubular and Rod Structures from the Cenozoic (Miocene) Rocks of the Kii Peninsula, Wakayama Prefecture Southwest Japan. Ibid., Nat. Sci., no. 15, Contri. No. 61, p. 115-121, 1 table, 1 pi.
Katto, J., Masuda, K., and Sako, Y., 1975-A note on the so-called Upper Muro Group Wakayama Prefecture, (in Japanese). Ibid.,・vol.24, Nat. Sci., no. 15, Contri., No. 66 （ｉｎPress).
Macsotay, O., 1967-Huellas Problematicas y su Valor Paleoeco】ogico en Venezuela. Geos Univ. Cen. Venezuela, no. 16, p. 7-39, 18 pis. ， ’
Mizuno, A･, 1957-Explanatory Text to the Geological Map of Japan, Scale 1:50,000, Nachi Sheet. Geol. Surv. Japan, p. 1-37 （ｉｎJapanese)+l-3 (English Abstract), 13 text･fig.,1 geol. map. Newman, W. A., Zullo, V. A., and Withers, T. H., 1969Cirripedia, in, Treatise on Invertebrate Paleontology,￡d. R. C. Moore, Geol. See. America and Univ. Kansas Press, Part Ｒ， Arthopoda 4，p. 206-295, figs. 80-119.
Okuda, S., and Iizuka, K., 1949-PoIychaeta, in. Illustrated Encyclopedia of the Fauna of Japan (Revised edition) Hokuryu-kan Book and Publ. Co., Tokyo, p. 1310-1348バigs. (in Japanese)
Some Miocene Marine Fossils from the Kii Peninsula Wakayama Pref. （ＫＡＴＴＯ） 55
Perdigao, J. Ｃ･, 196 1-Nereites do Baixo Alentejo. Comm. Serv. Geol. Portuga】tome 45, p. 339-363, 10 pis.
Pilsbry, H. Ａ･，1 9 16-The Sessile Barnacles (Cirripedia)･Contained in the Collections of the Ｕ. S. National Museum; Including ａ Monograph of the American Species. U. S. Nat. Mus. , Bull. 93, 366 p･，99 text-figs.,76 pis.
Sako, Y., 1972-Fossils from the Miyai Group. Roto, Nos. 4-5, p. 41 ―47, many sketches of certain fossils, 1 geol. map, Published by Sekiyu-kai. (ｉｎJapanese)
Segawa, S., 1974-Coloured Illustrations of the Seaweeds of Japan. Hoikusha Publ. Co., Ltd., p･ 71-76, pi. 40-42.
Shrock, R. R., and Twenhofel, W. H., 1953-Principles of Invertebrate Paleontology, McGraw- Hill Book Ｃ. Inc., p. 503-515, figs. 11,12.
Yokoyama, M. , 1923-Tertiary Fossils from Kii, Japan. Jour. Geol. Geogr･，ＶＯ】.2, p. 47-58, 2 pis.
Explanation to Plate
(AH from the Shimosato Formation)
Fig. 1.Ｓｃａｌａｒitｕba fetｉｅｎｓｔｓKatto, n. sp. Almost in natural size. Note the flaring ridges. Each posterior one overlapping the adjacent anterior one. Locality : −Takatomi, Kushimoto- cho, Wakayama Prefecture.
Fig. 2.Ｋ.iiｖｅｒｍｕｓ ｓabiｕｒａｅｎｓiｓKatto, n. gen. n. sp. Slightly enlarged. Note the two Spe･ cimens, one overlapping the other. The narrowest one in the depression part is ａ Ｃｏｎ･ tinuation (?）of the large one at the right. Variously curved and clustered. Locality:・ Sabiura, Kushimoto-cho, Wakayama Prefecture.
Figs. 3, 4｡5.Sabiｕｒａｃｏｌｉtｅｓ iｘｉａｋａｙａｍａｅｎｓiｓKatto,n. sp. Fig. 3-the concave form. Fig. 4-the convex form. Fig. 5-the type species and slightly enlarged to show the details of the central hollow and the radial rays. Locality: . Takatomi, Kushimoto-cho, Wakayama Prefecture.
Figs. 6， 7, 8. Ｈａ lime ｄａ sp. (probably ａ new species). Fig. 6-detached and worn frond. Fig. 7･enlarged view to show details of nodes, mode of attachment and their arrangement. Fig. 8･frond in almost natural size. Locality:− Takatomi Kushimoto-cho Wakayama Prefecture.
J. Katto: Some
