78 CANCELLARIA. 



white, tinged with light chestnut, especially upon the ribs 

 which thus become more apparent. Length, '75-1 inch. 

 Cagayan, Isl. of Mindanao, Philippines, 



sandy mud, 25 fms. (Cuming). 



C. TUBERCULOSA, Sowb. PL 5, figs. 76-78. 



Deeply umbilicated, concavely shouldered around the suture, 

 which is coronated with blunt tubercles at the angle, below it 

 are two or three somewhat equidistant spiral rows of tubercles, 

 with spiral striae in the interspaces ; columella obliquely pro- 

 duced below, with two small plaits ; yellowish white, tubercles 

 often tinged with chestnut, forming somewhat interrupted 

 narrow bands. Length, 1-25-1-5 inches. 



Iquiqui, Peru, 7 fms. (Cuming) ; Gulf of Nicoya, 



Central America, 12 fms. (Cuming). 



The latter locality is that of C. bullata, Sowb. (fig. 78), which 

 is certainly a synonym. 



C. TRIGONOSTOMA, Lam. PL 5, fig. 79. 



Scalariform, the angles of the shoulder and of the wide 

 umbilical excavation both spinose, obsoletely longitudinally 

 ribbed, spirally 'ridged ; flesh-color, sometimes lineated with 



chestnut. Length, 35 mill. 



? Ceylon ; ? Moluccas. 



A very rare shell, first described by Lamarck as a Delphinula. 



C. GONIOSTOMA, Sowerby. PL 5, figs. 80-85. 



Excavately shouldered, widely umbilicated, distantly strongly 

 ribbed, the ribs crossing the shoulder to the suture, rather 

 coarsely spirally ridged, the intersections often bluntly nodose ; 

 aperture ridged within, columella two- or obscurely three- 

 plaited ; yellow, yellowish brown, or light chocolate-color, inter- 

 ruptedly lineated spirally with chestnut. Length, 1-1-4 inches. 

 West Coast of Central America, northward to Mazatlan. 



The following are synonyms: C. brevis, Sowb. (fig. 82), a 

 small, worn specimen ; C. costata, Gray = C. rigida, Sowb. (figs. 

 83-85), said to come from the mouth of the Gambia, by 

 Sowerby, but referred by Reeve, on the authority of Cuming, 

 to Puerto Portrero, Central America. 



