42 AKT. 2. — S. TOKÜNAGA. 



This specimen may be perhaps the young of Tresus nuttali 

 Conrad, but compared with the adult shell of Tresus nuttali 

 Conrad the posterior side is not truncated and more elongated. 

 The four living species of Japanese Luti'aria are not identical 

 with the present species. 



Oji (rare). 



106. TRESUS NUTTALI Conrad. 



Brauns, Greol. Env. Tokio, p. 38. — Middendorf, Mai. Ross., III., p. 

 66. — Morse, Shell-Mound of Ömori, p. 61. — Gould, Otia Conch., 

 p. 76. — LisCHKE, Jap. Meeres-Conch., I., p. 136. — Geol. Surv. 

 California-Palseont. II. — Arnold, Pal. and Str. Mar. Pliocene and 

 Pleistocene. San Pedro, (Mem. Cal. Acad. Sc, Vol. III., 1903). 



Synonym. — Lutraria maxima Midd.; L. capax Gould. 



Oji (abundant), Shinagawa (rare). 



Pliocene — Santa Barbara (California). 



Diluvium — Santa Barbara, San Diego, San Pedro, (Californa). 



Living : Tokyo, Yokohama, Hokodate, Sitcha, along west 

 coast of America from 34° N. to 58° N. (Vancouver Is., Fusca- 

 strasse, Puget sound, San Francisco, Mon tari, Sta Barbara, S. 

 Pedro, S. Diego). 



TELLINID/E. 



107. TELLINA NITIDULA Dkr. 



PI. II. Figs. 30 a, a\ and b'. 



Brauns, Geol. Env. Tokio, p. 39. — Lischke, Jap. Meeres-Conch., I., 

 p. 129, and II., p. 113.— Syst. Conch. Cab., X. 4, p. 161. 



Shinagawa and Oji (frequent). 

 Living : Misaki (Sagami) and Kii. 



