On Some Fossil Shells from the Island of Saishu. 7 



A single flat valve. 



IS. Pecten latiueatus, Soweeby'. 



Pecten laqueatus. Yokoyama, Foss. Miura Peuiu., p. 160, pi. XIV, figs. Î), 10. 

 Foes, Up. Musashiuo, p. 183. 



A single flat or left valve. 



19. Pecten. lœtus, Goulds. 



Pecten laetus. Yokoyama, Foss. Miura Peiiin., p. 152, pi. XIV, tigs. 1, 2. Foss. 

 Up. Musasbino, p. 180, pi. XIV, fig. 26. 

 Some fragments. 



20. Pecten tolsyoensis, ToKDNAGA. 



Pecten tokyoensis. Yokoyama, Foss. Miura Pcnin., p. 158, pi. XIV, figs. 1, 8. 

 Foss. Up. Musashino, p. 182. 



Two right and three left valves, 



21. Pecten cosibensis, YokoYama. 



(PL I., Fig. 5.). 

 Pecten cosibensis. Yokoyama, Foss. Miura Penin., p. 156, pi. XIII, figs. 7, 8. 

 A right valve 50 milhm. high. The ribs are fom- in number, 

 if we except the last one on each side of the sheU which is indistinct. 

 The two middle ones consist of three and the two lateral ones of 

 two unequal riblets. The interspaces are narrow, and radiately 

 and unequally co stellated. 



22. Peetunctilus vestitus, Dunker. 



Pectunculus vestitus. Yokoyama, Foss. Miura Penin., p. 167, pi. XVII, figs 10, 

 11. Foss. Up. Musashino, p. 189, pi. XVI, figs. 1-8. 

 A right and a left valve. 



23. Nucula insiynis, GoULD. 



'Nucula insignis. Yokoyama, Foss. Miura Penin., p. 179, pi. XIX, figs. 7, 8. 

 Foss. Up. Musashino, p. 198. 



A single right valve. 



