AMATHINA. 133 



Section Thyca, H. and A. Adams, 1854. 

 C. ASTERicoLA, Ads. and Reeve. PI. 40, fig. 88. 



High-conical, sculptured witii fine close-set radiating riblets ; 

 white ; margin crenulated. Alt. 6 mill. 



Sooloo Sea^ on the tubercle of a star-fish. 



Unfigured and doubtful species of Capulus. 



C. (Thyca) elegans, Tapp. Canefri (unfigured). Papuan Islands. 

 C. Cyther^a, Lesson (unfigured). Tahiti. 



C. PALEACEA, Menke (unfigured). Hab. unknown. 



C. Japonigus, a. Adams (unfigured). Japan. 



C. Garnotii, Payr. = Gadinia. 



C. Shreevei, Conrad. = Hinge process of Pholas costata, Linn. 



Genus AMATHINA, Gray, 1842. 



A. TRicosTATA, Guiel. PI. 40, figs. 89, 90. 



White, apex posterior but not marginal, recurved, with distant 

 radiating low stride posteriorly and three strong anterior ridges, 

 diverging and causing a projection of the margin. 



Length, 1 inch. East Indies, Japan. 



Patella tricarinota, Linn., to which this is referred by H. and 

 A. Adams, is an entirely different shell. 



A. NOBiLTS, A. Ad. PI. 40, fig. 91. 



Shell shaped like Capulus, solid, white ; apex median, acute, 



involute, turned to the riglit; strongly bicarinated, posterior 



margin dilated. Length, 25 mill. 



Saghalien Island, Japan. 



A. ANGUSTATA, Souverbie. PI. 40, fig. 92. 



Elongated, narrow, a little twisted, apex recurved, spiral ; with 

 three or four anteiiorly directed strong carinations, the rest of 

 the surface with slighter radiating cariuae. Length, 12 mill. 



N. Caledonia. 



A. TRiGONA, Sowb. (unfigured). Friendly Islands. 



A. BiCARiNATA, Pcasc (unfigurcd). Sandivich Islands. 



Judging from the descriptions, these two species are closely 

 allied, perhaps identical. 



