FOSSILS FROM THE ENVIRONS OF TOKYO. 59 





Tabata, Shinagawa and Oji (frequent). 



145. A HC A RANGS A Linné. 



PL 111. Fig. 20. 



Brauns, Geol. Env. Tokio, p. Qß. — ^NIorse, Shell-Mound of Öiuori, p. 

 26.— LiscHKE, Jap. ^leeres-Couch., I., p. 145.— Pilsbry, Cat. Mdv. 

 jMoU. Japan, p. 148. — Sowerby, Genera rec. and foss. Shells. — 

 Reeve, Monogr. Aica, fig. 15.— Syst. Conch. Cab., VIIL 2, p. 38. 

 — Petermann's Geogr. MittheiL, X., XI., XII. 



Tabata (frequent). 



Diluvium — ïempé (South Celebes). 



Found in Neolithic Shell Mounds, but now extinct in 

 Tokyo Bay. 



Living: Eiioshima (Saganii), Tottori, Iniö (Bicchu), Oka- 

 yania, Nagasaki, Hyakwanzaki (Higo), Cochin China, Chi-fu, 

 Philippines, Singapore, Cape St. Jacques,, Ceram, Celebes, Tran- 

 quebar, Nicobar, Java, IMergui and E. Indies. 



146. ARCA KAGOSHLIENSIS Tok. 

 PI. III. Figs. 21 a and b. 



Shell small, solid, oblong, tumid ; anterior side rounded ; 

 posterior subtruncated ; surface sculptured with from thirty-one 

 to thirty-four iinely granulated radial ribs, with interstices 

 broader than the ribs ; umbones slightly directed anteriorly ; 

 teeth numerous. 



