Fossils from the Upper Miisashino of Kaznsa and Shimosa. 193 



granular. Hinge curved, with oblique lamellar teeth ten to four- 

 teen on each side of the ligamental pit which is triangular and pro- 

 vided in some Avith two diverging ridges and a few transverse striae. 

 Beaks small, pointed. Inner margin flattened and smooth. 



There is some variation in form, the height being sometimes 

 a little less, sometimes a little greater than the length. The con- 

 vexity is also somewhat variable. 



The largest specimen obtained is a left valve, 17.3 miUim. 

 long, 17.5 millim. high and 5.4 millim. deep. 



Smith in his Challenger Lamellibranchiata (p. 256) unites 

 Limopsis woodwardi with Reeve's Limojosis cancellata which lives in 

 Northern Australia, Torres Strait, Singapore, etc. But at present 

 I am not in a position to utter any opinion on it. 



Fossil occurrence.— Otake, Tega. Oji (common) and Shina- 

 gawa. 



Living. — Central Japan. 



323. Lhnopsis creiiata, A. Adams. 



Limopsis crenata. A. Adams, Descript. Limopsis of Cuming. Coll., Proc. Zool. Soc. 

 Lond., 1862, p. 230. Yokoyama, Foss, Miura. Penin., p. 173, pi. XVIII, figs. 

 17, 18. 

 A few isolated valves. 



Fossil occurrence. — Otake. LoAver Musashino of Miyata, 

 Kamakura, Kanazawa, and Koshiba. 



Living. — Northern, Central and Western Japan. 



334. Zjimopsis m^umana, Yokoyama. 

 Limojjsis a::umana. Yokoyama, Foss. Miura Peniu., p. 174. pi. XVIII, figs. 12-21. 



More frequent than the preceding species. 



Fossil occurrence. — Shito, Otake. Lower Musashino of Mi- 

 yata and Koshiba, 



325. Zjitnopsis ttdantsiana, Yokoyama. 

 Limopsis adamsiana. Yokoyama, Foss. Miura Penin., p. 175, pi. XIX, figs. 1, 2. 



The species founded on two right valves from the Lower 

 Musashino is somewhat frequent in the Upper. The left valves 



