CERION. GROUP VIII. 233 



Form eucosmium P. and V. PI. 34, fig. 11. 



Shell with the form and size of regina, but smooth, glossy, riblets, 

 or with a few irregular ribs on body-whorl ; livid, pinkish-brown or 

 gray-brown, profusely streaked and marbled with white. 



Form brevispirum P. and V. PI. 34, fig. 15. 



Shell short, pupiform, compact ; lower two whorls of equal diam- 

 eter, those above tapering to form a short cone. Whorls 8-9, all 

 but the last one smooth, the last more or less ribbed ; umbilical chink 

 deep, the area below it excavated. Aperture much exceeding one- 

 third the length of shell, ovate, purple ivithin ; peristome narrowly 

 reflexed, not thickened, white ; parietal callus imperceptible ; parietal 

 lamella small, rather short, deep-seated. Axial lamina small. 

 "White, boldly streaked and blotched, and marbled with rich brown. 

 Alt. 22, diam. 10 mill, or smaller. Apert., alt. 9.5 ; width 8.3 mill. 

 Turk's Island. (W. M. Gabb.) 



This form looks very distinct from C. regina, and we have no 

 intermediate specimens; but it occurs on the same small island, and 

 will probably prove to be only a sub-species of that form. 



C. INCANOIDES Pilsbry & Vanatta. PI. 35, figs. 25, 26. 



Shell resembling C. incanum in general aspect. Thin, cylindrical, 

 the lower three whorls of equal diameter, those above forming a con- 

 vex, obtuse cone ; deeply rimate, with a rather large excavated area 

 behind the flaring columellar lip. Surface nearly smooth, as in C. 

 incanum; white or fleshy-white, the two nepionic whorls corneous 

 brown, the following whorls of cone finely variegated with zigzag 

 brown marking and speckling, or without such markings. Whorls 

 9^ to 10, nearly flat, the last with a few rather strong folds or ribs 

 on its latter half. Aperture brown within, peristome reflexed, a 

 little recurved, the parietal callus moderate or thin, without raised 

 edge. Parietal lamella slender but rather long; axial lamella small. 



Length 30, diam. 11, length of aperture 11 mill. 



Length 25|, diam. 9, length of aperture 10| mill. 



Length 24, diam. 8i, length of aperture 10^ mill. 



Bahamas : Turk's Island. 



C. incanoides P. & V., Proc. Acad. Nat. Sci. Phila., 1895, p. 209; 

 1896, p. 320. pi. 11, f. 15. 



Curiously like C. incanum superficially, but differing in the larger 



