gQ Art. 1. — M. Yokoyauia : 



34. Pilsbry, Cat., p. 84. Tryon, Man. Conch., Ill, p. 211, pi. 82, fig. 463. Brauns, 

 Geol. Env. Tokio, p. 64. Tokunaga, Foss. Env. Tokyo, p. 9. 



This shell so common among the living ones near Tokyo 

 is also not infrequently found as a fossil. 



Fossil occurrence. — Otake, Shisui, Tega. Oji (frequent) and 

 Shinagawa according to Tokunaga. 



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



Family Nassldae. 



Genus NASSA, Lamarck. 



65. Xftsstt {HitÈtii) Japoiiiea, A. Adams. 



'Sassa (Hivia) japonica. Pilsbry, Catalogue, p. 86. Yokoyaiua, Foss. Miura Pcnins., p. 



56, III. fig. 5. 

 NassaJajMnica. A. Adams, Proc. Zool. Soc. Lond., 1851, p. 110. Liscbke, Jap. Meeres- 



concli.. Ill, p. 37, pi. II, figs 20-23. Brauns, Geol. Env. Tokio, p. 29, Tokunaga, 



Foss. Env. Tokyo, p. 9. 

 Nassa tennis. Smith, Ann. Mag. Nat. Hist., 1875, p. 423, Proc. Zool. Soc. Lond., 



1879, p. 211. 



This species which has been fully described in my work above 

 cited is very frequent at some localities. It is easily distinguished 

 from the following species Ijy its finer sculpture, the number of the 

 longitudinal costae being more than twenty on the body-whorl. 



Fossil occurence. — Otake (abundant), Shisui, Kamenari, Tega, 

 Shito. Oji, Tabata and Shinagawa (abundant) in Musashi. 



Living. — Central and Western Japan. 



66. Nassa {Hhiui) fesfira, Powis. 



Nassa {Hima) /estiva. Pilsbry, Catalogue, p. 35. Yokoyama, Foss. Miura Penin., p. 57, 



pi. IV, fig. 6. 

 Nassa f estiva. Powis, Proc, Zool. Soc. London, 1835, p. 95, Lisclike, Jap. Meeres- 



concb., II, p. 53. Dunker, Index Moll. p. 37. Tryon, Man. Couch., IV, p. 46, pi. 14, 



figs. 239-242. 

 Nassa lirata. Dunker, Moll. Jap., p. 7, pi. I, fig. 22. 



Several examples. The shell which in its sculpture reseml)le3 

 Nassa fraterculus mentioned below is easily distinguished by its 

 larger and more inflated form with a shorter spire. The tubercula- 



