172 CYPRjEA. 



C. ERYTHR^ENSIS, Beck. PL 5, figs. 93, 94. 



Differs from C. stolida in the absence of the four corner 

 lateral spots, the colorless teeth, the narrower and more 

 tapering form, and the uniform smallness of the shell. 



Length, *65-*85 inch. 



Red Sea. 

 C. CHRYSALIS, Kien. PL 4, figs. 64, 65. 



Canary, obscurely banded, with extremities tinted deep 

 orange, teeth very fine ; no spots or other markings on the 

 shell. Length, -65 inch. 



Habitat ? 



Believed to be the young form of some other species. I do not 

 know this species, nor can I get any further information than 

 that derived from Kiener. 



Section II. (Aricia, Gray, pars) Shell ovate, thick, margined, 

 with flattened base. 



Group A. Shell smooth. 

 * Not spotted. 



C. VENTRICULUS, Lam. PL 6, figs. 95, 96. 



Shell rather angulated, back bluish white, ornamented with 

 four carnelian bands, sides dark chestnut, tinged above with red, 

 smoky white beneath, with a number of very fine striae rising on 

 the margin ; base livid white. Length, l'8-2'2 inches. 



Annaa /., Pacific 0. 



The younger shell is pale fulvous, encircled with four carnelian 

 bands, and the adult is a truly solid mass of enamel. 



C. ARENOSA, Gray. PL 6, figs. 1, 2. 



Base more convex than the preceding, the back has a similar 

 ornamentation, but the margins are ash-brown, arenaceously 

 striated above, and the base is ivory-white ; teeth fine and 

 numerous. Length, 1-1-1-5 inches. 



Annaa /., Central Pacific. 



The young shell is pale brown, with four carnelian bands. 



C. SULCIDENTATA, Gray. PL 6, figs. 3, 4. 



Differs from C. arenosa in the teeth, the interstices of which 

 are deeply excavated, the colors are duller and the base is smoky 



