106 COLUMBELL A. 



C. LABIOSA. Sowb. PI. 43, figs. 22, 23. 



Epidermis very thin, smooth, translucent, olivaceous ; under 

 which the shell is ash-color, with numerous narrow chestnut 

 revolving lines; lip and columella white, the lip with plate-like 

 expansion internally. Length, '8-1 inch. 



-> St. Elena, W- Columbia (Cuming). 



C. venilia, Duclos (fig. 23), is a synonym. 



C. H^MASTOMA, Sowb. PI. 43, fig. 24. 



Shaded chestnut and chocolate-color, with white blotches 

 which are usually arranged as broad zigzag markings on the 

 shoulder, and similar ones at the base of the body-whorl, the 

 latter often coalescing to cover the entire basal portion of the 

 shell ; aperture orange-color. Length, 1 inch. 



Galapagos Is.; Panama to Gulf of California. 



C. FESTIVA, Kiener. PL 43, fig. 25. 



Shell smooth; white .around the sutures, then spotted and 

 streaked longitudinally with white and chocolate ; aperture white. 



Length, 9 mill. 



Acapulco to Cape St. Lucas, L. California. 



C. PHASINOLA, Duclos. PL 43, fig. 2(>. 



Shell with revolving rounded ribs, often decussated by longi- 

 tudinal sculpture, so as to become tuberculated; chestnut-brown, 

 the tubercles whitish; lips orange. Length, 10 mill. 



Habitat unknoim. 

 C. MERCATORIA, Linn. PL 43, figs. 28-33. 



Shell with small rounded revolving ribs, separated by narrow 

 grooves ; sometimes unicolored, pink or ;\ ellowish, usually longi- 

 tudinally maculated with orange or chocolate and white, and 

 with or without chocolate articulations forming one or two bands ; 

 aperture white or slightly yellowish. Length, -6-*8 inch. 



West Indies, Florida. 



A common species, very variable in painting, but pretty con- 

 stant in form and sculpture; it occurs on sandy bottoms in from 

 two to four feet water. The synonyms are numerous, including 

 a large, coarsely ribbed form, called by Sowerby G. nuUn (fig. 

 31). Reeve has figured this form under the name of G. Peleei, 

 Kiener, and has given for locality the Philippine Islands 

 undoubtedly an error. . The true C, Peleei, Kiener (fig. 32), is, on 



