CERION. GROUP VIII. 233 



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



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

 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 within; 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 G. 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 G. 

 .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 

 9Jf 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 10J mill. 



Length 24, diam. 8-|, 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 G. incanum superficially, but differing in the larger 



