Fossils from the Upper Musashino of Kazusa and Shimosa. \ 5 



Fossil occurrence in Europe. — English Crag. 

 Living. — Northern, Central and Western Japan. Britain. 

 Mediteranean. 



283. Jlodiola iuotlioltis, Linné. 



Modiola modiolus. Linné, Syst. Nat., Ed. 10, p, 706. Lischke, Jap. Meeresconch., I, 

 p. 156, II, p. 147, III, 109. Dunker, Ind. Moll., p. 222. Tokunaga, Foss. Env. 

 Tokyo, p. 63. Yokoyama, Foss. Miura Penin., p. 145, pi. XI, fig. 21. Wood, 

 Crag MoU., Biv., p. 57, pi. VIII, fig. 1. Nyst, Conch. Terr. Tert. Belg., p. 163, 

 pl. XVII, fig. 5. 



Specimens are all fragmentary, though of a large size. 



Fossil occurrence in Japan. — Shito (rare). Lower Musashino 

 of Miyata. 



Fossil occurrence in Europe. — English Crag; Pliocene of 

 Belgium and Italy. 



Living. — Northern, Central and Western Japan. North 

 Pacific. North Atlantic. 



Genus tlTHOPHAGA, Bolten. 



2S4. Liifliopfiaf/a ;sitteliana, Dunker. 

 PI. XVII. Fig. 14. 



Lithophaga dtteliana. Dunker, Ind. j\Io11., p. 226, pl. XIV, figs. 1, 2, 8, 9. Pilsbry, 

 Cat., p. 140. 



A transversely elongated subcylindrical shell, elliptical in 

 cross-section, rounded at both ends, though posteriorly somewhat 

 more expanded. The surface has only lines of growth. 



A few small fragments. 



Fossil occurrence. — Otake. Tabata in Musashi. 



Living. — Western Japan. 



Genus CRElVELtA, Brown. 



3S5. Ofenella elivaricata, Yokoyama. 



Pl. XV. Figs. 10, 11. 



Shell minute, thin, translucent, longitudinally elongated, 

 roundly oblong, tumid, subequilateral. Anterior and posterior 

 margins broadly rounded, the former perhaps a little more sharply. 



