1 i ssils From the Miura Peninsula and its [mmendiate North. ] 2 j 



Genus Sa.tidotniis, Conrad. 



L57. Saxidomus purpuratus, (Sowekby). 



Pl. IX. Figs. 8, 9. 



Saxidomus purpuratus. Deshayes, in Cat. Conch. Brit. Mus. p. 188. Lischkk, Jap. 

 Meeresconch., I. p. 127. Dunker, Index Moll. p. 206. Brauns, CtooI. Env. Tokio, p. 40, pl. V. 

 rig. 20. 



Saxidomus Nultali. Conrad, Journ. Acad. Sei. Philad., 1837, VII. p. 249, pl. XIX, fig-. 12. 

 Pfeiffer, in Syst. Conch. Cab., X. pt. 1. p. 242, pl. 37, figs. 2-4. Schrenck, Nordjap. Moll., p. 

 253. Tokunaua, Foss. Env. Tokyo, p. 45. 



Saxidonms giganteus. Martens in Preuss. Exped. nach Ostasiens, zool. Abth., vol. I, pt. 1, 

 p. 140. 



This is a very common shell in the Musashino formation of 

 the neighbourhood of Tokyo. It is large, transversely oval, thick, 

 swollen, deeply purple within in the living specimens. The 

 muscular and mantle impressions are deep and distinct, with the 

 palliai sinus deep and finger-like. The fossil specimens which we 

 possess are not very large, the largest measuring 83 millim in 

 length and 05 millim in height. We have nothing to add to the 

 minute descriptions given by Lischke. 



Frequent, 



Fossil occurrence: — Yokosuka Zone (Otsu and Yokosuka); 

 Upper Musashino of Musashi, Kazusa and Shimosa. 



Living: — Northern, Central and Western Japan ; Sitka; Cali- 

 fornia; Chile; Bonin Islands; Indian Ocean. 



Family Cardiidae. 

 Genus Cardium, Linne. 

 158. Cardium californiense, Deshayes. 

 Pl. IX. Fig. 10. 



Cardium californiense. Deshayes, Revue Zool. p. 1. Soc. Cuvierienne, p. 360. Midden- 

 dorff, Sib. Reise, Meeres-Mollusken, p. 218, pl. XIX, figs. 6-11. Mai. Eoss. Ill, p. 40, pl. XV, 

 figs. 23-25. Schrenck, Xordjap. Moll., p. 514. Lischke, Jap. Meeresconch., I, p. 144, III. p. 

 125. Brauns, Geol. Env. Tokio, p. 42. Tokunaga, Foss. Env. Tokyo, p. 50, pl. Ill, fig. 5. 



Several young specimens and a moderately grown left valve. 

 All these fossil forms have the anterior margin not quite rounded 

 as in the living ones described by Middendoeff, but subangulated. 

 A left valve represented in the figure, 33 millim. long, 27 millim. 



