CYCI.OSTIIKMA. 99 



C. TUBERCULOSA, d'Orb. PL 35, fig. 65a. 



Narrowly umbilicated, thick, white, with six tuberculated spiral 

 ribs; whorls 4, convex, the last large; aperture rounded, peristome 

 thick, externally tuberculated. Diam. 2 mill. 



Cuba. 

 Section DARONIA, A. Adams. ls(i4. 



( J. CYOLOTINA, A. Ad. PL 33, fig. 16. 



Umbilicus large, flat within, surface smooth, spire flat, last whorl 

 rapidly increasing, not contiguous, aperture subangular above. 



Diam. 4 mill. Japan. 



C. SUBKXCAVATA, Tryon. PL 33, figs. 17, 18. 



Umbilicus wide, perspective, shallow, whitish under a yellowish 

 brown, membranous epidermis, spire scarcely raised, suture broadly, 

 angularly impressed, a little below the suture there is a bluntly 

 angulated spiral keel, and on the middle of the base, towards the 

 mouth there is another keel; whorls 4, rather slowly increasing, 

 until the last, which is rather large; mouth a little oblique, peristome 

 simple, thin. Diam. 2'15 mill. 



Off Culebra Isl., W. Indies; 390 fms. 



Described by Watson as C. excavata, preoccupied by Carpenter. 



C. CATEXOIDES, Monts. PL 34, figs. 20, 21. 



Widely umbilicated, closely spirally striated throughout, with 

 several spiral chain-like lines on the base, whorls convex, regularly 

 increasing. Diam. 1*25 mill. 



Harbor of Civita Vecehia, Italy. 



C. SEMISTJLCATA, Issel. PL 34, fig. 22. 



Widely umbilicated, subpellucid, shining, closely spirally sulcate 

 above, smooth below; whorls 4, rapidly increasing, convex ; peris- 

 tome simple, acute, margin interrupted. Diam. 3 mill. 



Red Sea. 



C. OCTOLYRATA, Carpenter. PL 34, figs. 24, 23. 



Widely umbilicated, with eight spiral lira? covering the last whorl; 

 whorls 3 2, convex, regularly increasing; peristome thin, modified 

 by the lira?. Diam. 1'75 mill. Red Sea. 



The figure is from a shell identified by Issel with Carpenter's 

 description. 



