Fossils from the Mi ura Peninsula and its [minencliate North. 123 



Cossmann and Peyrot under the name of Timoclea subspadicea 

 (Conch. Néog. de l'Aquitaine, p. 363, pi. XIV, figs. 36-40) from 

 the Miocene of France in being trigonal, in having radiating ribs, 

 and in the form of dentition, though in other respects there are 

 mue h differences. 



Fossil occurrence. — Naganuma Zone (Naganuma). 



Genus Circe, Schumacher. 



151. Circe scripta, (Linné). 



Pl. VIII. Figs. 15, 16. 



Circe scripta. Dunker, Index Moll., p. 201. Sowerby, Thes. Conch., Il, p. 651, pl. 139, 

 figs. 38-43. Pilsbrt, Cat, Mar Moll, Jap., p. 128. 



Circe undatina. Lischke, Jap. Meerescnch., Ill, p. 87. SoweRBY, Thes. Conch. II, p. 651, 

 pl. 138, figs. 22-26. 



Venus scripta. Linné, Syst. ed. X, p. 689, no. 121 ; ed. II, p. 1135, no 145. 



Cytherea scripta. Lamarck, Aniui. s. vert., N. p. 575 no. 57. Pfeiffer, in Syst. Conch. 

 Cab., XI, pt. 1. p. 54, pl. 20, figs. 1-4. 



Two young valves belonging to a Circe described by Lischke 

 and Sowerby as C. undatina Lam. and by Pfeiffer as C. scripta L. 

 They are very small; the one (right valve) measuring 5,5 millim. 

 in length and 5 millim. in height, and the other (left valve) 7,5 

 millim. in length and 7 millim. in height. They are both much 

 worn by friction, but their form and other characters exactly agree 

 with those of the recent specimens found near our coast. 



Fossil occurrence. — Naganuma Zone (Naganuma). 



Living. — Central and Western Japan ; Australia; Red Sea. 



Genus Vetterndes, LAMARCK. 



152. Venerupis irus, (Linné). 



Pl. IX. Fig. 1. 



Venerupis irus. Lamarck, Aniui. s. vert. V, p. 507. Sowerby, Thes. Conch., II, p. 763. pl. 

 164, fig. 1, pl. 165, figs. 31, 32. Philippi, Enuni. Moll. Sic, I, p. 21, II, p. 20. Wood, Crag 

 Moll., Bivalves, p. 205, pl. XIX, fig. 6. Middendorff, Mai. Ross., Ill, p. 51. 



Rupellaria irus, Dusker, Index Moll., p. 208 no 111. 



A right and a left valve of young shells, and a broken left 

 valve of an adult one. 



