Fossils from the Miura Peninsula and its [mmendiate North. \'2b 



comparison with recent forms leaves no doubt of their being 

 identical with Deshayes species. 



Fossil occurrence. — Yokosuka Zone (Otsu and Yokosuka). 



Living. — Central Japan; New Zealand. 



Genus Tapes, Megerle von Mühlfeldt. 



154. Tapes variegatus, Hanley. 



Pl. IX. Figs. 4,5. 



Tapes variegatus. Sowerby, Thes. Conch., II, p. 696, pl. 151, figs. 133-138. Lischke, Jap. 

 Meeresconch., I., p. 118, 11, p. 108, III, p. 79. Donker, Ind. Moll., p. 209. 



}'enus rai-ierjata. Pfeiffer in Syst. Conch. Cab., XI, pt. 1, p. 223, pl. 38, figs. 2-5. 



Two right and three left valves, all of young shells. They are 

 rather thin, transversely elliptical, strongly inequilateral, rather 

 compressed and ornamented with numerous, close, radiating 

 riblets crossed b}^ incremental lines. Lunula broadly lanceolate, 

 bounded by indistinctly impressed lines. Area lanecolate, also 

 not very distinct. Palliai line not exposed, being covered 

 with sands firmly attached to the inner side of the shells. 



All the specimens belong to a comparative longer forms, the 

 proportion of length to height being about ten to six and a half. 

 The largest one (right valve) measures 16 millim. in length, 10 

 millim. and 3,5 millim. in depth. 



Fossil occurrence. — Miyata Zone (Kami-Miyata). 



Living. — Central and Western Japan; Philippines. 



155. Tapes philippinarum, (A. Adams ct Keeve). 

 Pl. IX. Fig. 6. 



Tapes philippinarum. Lischke, Jap. Meeresconch., 11. p. 115, II, p. 108, III, p. 78. Pilsbei, 

 Cat. Mar. Moll. Japan, B. 130. Sowerby, Thes. Conch., II, p. 694, pl. 151, figs. 139-141. Dun- 

 ker, Ind. Moll. p. 207. 



Venus philippinarum. Adams and Reeve, Voy. Samarang, Mollusca, p. 79, pl. XXII, fig. 10. 

 Pfeiffer iN Syst. Conch. Cab., XI, pt. 1, p. 230, pl. 39, figs. 7,8. 



Venus deeussata rar. japonica. Dunker, Moll, Jap., p. 26. 



Venus decussata. Schrenck, Nordjap. Moll., p. 533. Brauns, Geol. Env. Tokyo, p. 53. 



Venus decussata rar. philippinarum. Tokunaga, Foss. Env. Toyko, p. 49, pl. Ill, fig. 7. 



'Tapes japonica. Deshates, Proc. Zol. Soc. Lend. 1853, p. 10. 



Venus indica. Pfeiffer in Syst. Conch. Cab., XI, pt. 1, p. 225, pl. 38, figs. 8-11. 



