14 CONUS. 



Distinguished from G. trochulus by its narrower, straighter 

 form, the sulcated body-whorl and striated spire. 



C. CYANOSTOMA, A. Ad. PL 3, fig. 44. 



Shell doubly striated on the spire, with revolving striae 

 towards the base ; ash-color, with longitudinal, brown markings, 



aperture violaceous. Length, 1 inch. 



West Africa. 



May perhaps = C. trochulus, Reeve, as suggested by Wein- 

 kautf, but none of my specimens of the latter species have striae 

 on the spire, and they are all white, as in all the published figures. 



C. CLARUS, E. A. Smith. 



Shell abbreviately turbinate, rosy white, sulcate towards the 

 base; spire depressed-conical, striate; angle of body-whorl 

 carinated; aperture light rosaceous. Length, 27 mill. 



West Australia. 



An unfigured species, represented by a single specimen in the 

 British Museum. It is said to somewhat resemble C. cyanostoma, 

 A. Adams, but is narrower. 



C. FRTGIDUS, Reeve. Plate 3, fig. 45. 



Shell pale straw-color, violaceous at base and apex; spire 

 three-grooved, revolving striae on the lower part of the body- 

 whorl, which become granulose towards the base. 



Length, 1 inch. 



Habitat unknown. 



A species having no well-marked characters. 



C. VENULATUS, Hwass. PL o, figs. 46-50. 



Color varying from light chestnut to dark chocolate, with 

 indistinct darker revolving lines, irregularly marbled throughout 

 with white ; spire and lower part of body-whorl striate. 



Length, 1*25-2 inches. 



West Coast of Africa. 



The synonyms are C. nivosus, Lam. (fig. 47), and C. ateralbus, 

 Kiener. Dr. Weinkauff considers C. unifasciatus, Kiener, a 

 juvenile of the species, but does not state his reasons; the 

 figure is so different that I cannot agree to place the species 

 here. 



