\QQ Art. 1. — M. Tokoyama : 



254. Dîplodoftfa semiaspera, Pbilippi. 



PI. XIV. Fig. 2. 



Diplodonta seyniaspera. Pbilippi, Archiv, f. Naturgescli., I, 1836, p. 225, pi. VII, fiig. 2. 

 Duuker, Ind. Moll., p. 48. Yokoyama, Foss. Miura Peniu., p. 131, pi. X, tigs. 2,3. 

 Mysia aff. semiaspera. Tokunaga, Foss, Env. Tokyo, p. 53, pi. III, fig. 13. 



This species which resembles the preceding in outline is 

 thinner, flatter and grows larger with beaks smaller and less 

 swollen. There is a large right valve measuring 34.4 in length. 

 The figured specimen is also a comparatively large one measuring 

 29.5 millim. in length, 27.2 millim. in height and 10 millim. in 

 depth. Rather frequent. 



Fossil occurrence. — Otake, Shisui, Tega, Shito. Oji in Mu- 

 sashi. Lower Musashino of Miyata and Koshiba. 



Living. — Central and Western Japan. West Indies. Ma- 

 zatlan. Patagonia- 



Family Lucinidae. 



Genus liUCINA, Bruguière. 

 355. JLueiiia pisidium, Duiiker. 



Lmina pisidium. Dunker, Moll. Jap., p, 28, pi. III, fig, 9. lud. Moll., p. 216. 



Liscbke, Jap. Meeresconcb., vol. II, p. 133. Pilsbry, Cat., p. 133. Yokoyama, 



Foss. Miura Penin., p. 132, pi. X, fig. 6. 

 Lucina parvula. Gould, Otia, Concb., p. 174. 



Rather rare, 



Fossil occurrence. — Otake, Shisui, Tega. Oji. Lower Musashi- 

 no of Miyata, Yokosuka and Naganuma, 



Living, — Northern, Central, Western and Southern Japan, 

 New South Wales. 



256. Jjueina horealis, (Linné). 



lucina horealis. Forbes and Hanley, Brit. Moll,, II, p. 46, pb 35, fig. 5. Wood, Crag 

 Moll., Biv., p. 139, pi. XII, fig. 1. Nyst, Coucb. Tert. de la Belgique, p. 176, pi. 

 XIX, fig. 2. BraunF, Gaol. Env, Tokio, p. 44. Tokunaga, Foss. Env. Tokyo, 

 p. 52, Yokoyama, Foss. Miura Penin., p, 133, pi. X, fig. 7. 



Venus horealis. Linné, Syst. Nat., ed. 12, p. 1134. 



