106 COLUMBELLA. 



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 colnmella white, the lip with plate-like 

 expansion internally. Length, '8-1 inch. 



>7. Elcnti, ]Y. Columbia (Cuming). 



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



C. H^EMASTOMA, Sowb. PL 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 Gape St. Lucas, L. California. 



C. PHASINOLA, Duclos. PL 43, fig. 26. 



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 iinknotm. 

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



Shell with small rounded revolving ribs, separated by narrow 

 grooves; sometimes unicolored, pink or yellowish, usualh' longi- 

 tudinally maculated with orange or chocolate and while, and 

 with or without chocolate articulations forming one or two bands ; 

 aperture white or slightly yellowish. Length, MJ-'S inch. 



West Jmlit'x, 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 ('. rndix (fig. 

 31). Keeve has figured this form under the name of C. Peleei, 

 Kiener, and has given for locality the Philippine Islands 

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



