138 Art. 1. — M. Yokoyama: 



The largest specimens at band are left valves, one of which 

 measures 56 millim. in length and 31 millim. in height, while 

 another Avith the same length shows the height of 35 millim. 



Fossil occurrence. —Northern to Western Japan. Phihppines. 

 Moluccas 



212. SoletelUna olivticea, Jay. 

 PI. VII. Fig. 11. PL IX. Fig. 17. 



SoletelUna olivacea. Jay, Eeport on Shells coll. by Jap. Exped. of Commodore Perry, 

 1856, p. 292, pi. I, figs. 8, 9. Lischke, Jap. Meeresconcli., I, p. 131, III, p. 98, 

 pi. VIII, figs. 7-12. Pilsbry, Cat., p. 122. 



Solenotellina olivacea. Dunker, Ind. Moll., p. 188. 



SoletelUna jaj)onica. Debeaiix, Jour, de Conch., II, pp. 245, 254. Eeeve, Couch. 

 Icon., Soletelliua, pi, IV, fig. 16. 



This shell is shorter and more oval than the preceding. The 

 right valve is almost flat, while the left is somewhat convex. 



Fo.ssil occurrence. — Otake (frequent), Shisui, Shito (very 

 frequent). 



Living.— Northern to Western Japan. North China 

 (Cheefoo). 



Family Tellinidae. 



Genus TJEI^l^IlVA Linné. 



313. Tellina Jedoensis, Lischke. 



PI. IX. Pig. 15, 16. 



Tellina jedoensis. Lischke, Jap. Meeresconcli., vol. Ill, p. 92, pi. IX, figs. 1-3. 

 Dunker, Ind. MoU., p. 190. Pilsbry, Catalogue, p. 124. Brauns, Geol. Env. 

 Tokio, p. 39. Tokunaga, Foss. Env. Tokyo, p. 43, pi. II, fig. 31. 



Lischke descrihes this little species as follows: 

 ''Shell oblong, rather thin, swollen in front, compressed 

 behind. The anterior side is considerably longer than the poste- 

 rior, the fold being pretty strongly marked. The dorsal margin is 

 straight, passing gradually into the well-rounded anterior margin 

 which also gradually goes over into the ventral; the latter runs at 

 first almost straight or only slightly curved, and then ascends 



