CANTHARUS. 163 



Fusus Floridanus, Petit (fig. 285), is undoubtedly a synonym 

 of this species. Neither of the figures nor the specimens before me 

 are adult, and the shell is so close to G. gemmatus, as to suggest 

 identity ; the sole distinctive characters being a more elevated 

 spire, and more convex whorls. 



C. TINCTA, Conrad. PI. 74, fig. 286. 



Irregularly variegated with chocolate- and chestnut-brown and 

 white ; margin of lip frequently tinted with orange-brown. Lon- 

 gitudinal ribs rather small, close, irregular or evanescent; re- 

 volving ridges sometimes broken up into tubercles where they 

 cross the ribs ; spire conical, its whorls flattened. 



Length, 1 to 1/5 inches. 



Florida ; West Indies. 



The ribs are more numerous, but not so large nor so markedly 

 tuberculate as in C. Coromandelianus, the latter possessing much 

 ruder sculpture and a decided shoulder on the body-whorl. 



C. COROMANDELTANUS, Lam. PL 74, figs. 287-290. 



Chestnut-brown and white, variegated, under a thin, rather 

 smooth, dark olive epidermis. Length, *75 to 1*25 inches. 

 Panama to Mazatlan, on rocks at low water ; West Indies ; 



Brazil; Coromandel? 



A very robust, wide species, rudely, prominently sculptured, 

 with very decided shoulder and produced posterior sinus. I can- 

 not detect any difference between the typical W. Indian (and 

 Coromandel?) form and C. ringens (fig. 288), from the West 

 coast of North America. C. pastinaca, Reeve (fig. 289), from 

 the Bay of Montija, W. Columbia, is probably a variety only. 



Yar. LAUTUS, Reeve. PL 74, fig. 290. 



Differs from the type in coloration, the prevailing arrangement 

 being chestnut variegated with white on the nodules, with a white 

 band on the periphery ; sometimes the shoulder and base of the 

 shell are both white, when it appears to have two irregular brown 



bands upon a white ground. 



West Indies. 

 C. HANETI, Petit. PI. 74, fig. 302. 



Brown, with reddish brown revolving lines ; strongly longi- 

 tudinally ribbed. Length, 37 mill. 



Near Rio Janeiro, Brazil. 



