308 CYLICHNA. 



closely plicate above, vertex widely perforated ; aperture narrow ; 

 lip scarcely rising above the apex ; columella subperforate, with an 

 obsolete fold. Alt. 3, diam. 1'5 mill. (Gld.). 



China Seas. 



C. villiea Gld., Proc. Bost. Soc. N. H., vii, p. 139 ; Otia, p. 112. 

 C. ELLiPSOiDEA Gould. Uiificfured. 



Shell minute, solid, elongated-elliptical, ivory-white, transversely 

 striated ; apex involute, widely umbilicate; lip scarcely rising above 

 the apex, broadly arcuate. Aperture very narrow, acute anteriorly; 

 columella short, strong, with a moderate fold ; parietal wall covered 

 with a copious callus. Alt. 3, diam. 1 -|- mill. ( GUI.). 



Loo Choo Is. 



C. ellipsoidea Gld., Proc. Bost. Soc, N, H., vii, p. 140; Otia, p. 

 112. 



C. L^ETA Gould. Uiijigured. 



Shell small, ovate, elongated, milky, shining, transversely striated 

 (viewed under a lens) ; vertex perforated ; aperture enlarged be- 

 low ; lip produced behind ; columella profoundly incurved, imper- 

 forate, with a moderately conspicuous fold. Alt. 5, diam. 2 mill. 

 A somewhat tumid, very symmetrical species. {Gld.). 



Kago-S'ima. 



C. heta Gld., Proc. Bost. Soc, vii, p. 140 ; Otia, p. 112. 

 C. CONSOBKINA Gould. TJnfigured. 



Shell cylindrical, short, narrowed in front, truncated behind, rather 

 solid, whitish, covered with a very fugacious epidermis, transversely 

 striatulate. Vertex indented, angular ; aperture narrow, straight, 

 the lip flattened at apex ; columella short, twisted. Alt. 6, diam. 

 more than 2 mill. (Gld.). 



West Coast of Jesso. 



C. consohrina Gld., Proc. Bost. Soc, vii, p. 141 ; Otia, p. 113. 



Size and general form of C. iriticea, but less rounded at the ex- 

 tremities, and pillar-fold less obvious. C. corticata is nearly the 

 same (Gld.). This may be a north Pacific form of C. alba var. cor- 

 ticata. 



C. OPOROSA Gould. TJnfigured. 



Shell minute, slender, cylindrical, greenish, polished, or very 

 minutely spirally striated at the base ; vertex obtuse, very openly 



