FOSSILS FROM THK ENVIRONS OF TOKYO. 43 



108. TELLTNA YEDOENSIS Lischki;. 



PL II. Figs. 31 a and a'. 



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

 p. 92. 



<)ji and Tabata (frequent), Shinagavva (rare). 

 Living : Tokyo and Kii. 



109. TELLINA SERRICOSTATA Tok. 



PI. II. Figs. 32 a, a' and b. 



Shell ovate, solid, equilateral, flattened ; anterior margin 

 rounded, posterior pointed, with the surface near it abruptly 

 concave, and either somewhat undulatory or irregularly ribbed; 

 concentric ribs very strong, serrated and dense, especially in the 

 posterior portion of the shell ; lunule small and lanceolate ; two 

 median and two lateral teeth in each valve ; mantle impression 

 deep. This species resembles Tellina serrata Brocchi, but the 

 thickness of the shell and the form of the poster o-d or sal margin 

 ■of the inner surface distinguish these two species. 



Length 34°^^ 25'"'", 25'"'" 



Height 24"""", 17'"'", 15""" 



Breadth 10""*, 8""", 9""". 



Shinagawa and Tabata (rare). 



no. TELLINA TENERA Say. 

 PI. II. Figs. 33 a and a'. 

 Syst. Conch. Cab., X. 4, p. 152. 



Oji and Shinagawa (rare). 



Living along the Northern Atlantic Coast of North Ame- 

 rica (from Cape Anu to New York and Massachusetts). 



