CUMA. 201 



is sufficient!}' large and miscellaneous in character to prove the 

 identity of all these forms, and that none of the names can stand 

 even as designations of varieties. 



C. CORONATA, Lam. PL 62, fig. 82fi. 



Yellowish, frecjuently encircled by numerous narrow brown 

 bands; aperture white or orange Avithin, sometimes incisely 

 striate. Length, l-25-l-'75 inches. 



W. Coast of Afrira. 



I have before me a specimen without tubercles, simply incisel}' 

 striate. Like C. kiosquiformis, the whorls are connected across 

 the sutures by laminae, but these vary from occasional develop- 

 ment, with wide intervening spaces, to a continuous succession 

 of closely appressed layers ; the latter state being the Purpurea 

 calUfera of Lamarck. 



C. GRADATA, Jonas. PI. 63, fig. 332, 338. 



Whitish, with revolving rows of brown spots ; aperture cream- 

 colored, and generally brown-banded within. 



Length, 1-1-25 inches. 



Singapore, Moluccas, China. 



The characters by which M. Petit distinguishes his Purpura 

 Grateloupiana (fig. 332), are not at all distinctive. Fig. 338 

 represents C. trigona, Reeve. 



C. TECTUM, Wood. PI. 63, fig. 330. 



Chocolate-brown externally, yellowish or chocolate within. 

 The deeply incised external sulcations become internally raised 

 lines. Length, r25-2'5 inches. 



W. Coast of Central Atnerica. 



Peculiar in the single, prominent median fold on the columella. 

 The adult is verj' gibbous and heav}-. 



C. RUGOSA, Born. PI. 63, figs. 328, 329, 334. 



Yellowish or brownish, dark brown on the tubercles ; aperture 

 white within. Length, 1-1-5 inches. 



Bombay, Singapore, Java. 



Known by many under the name of C. sacellum, Chemn., 

 adopted by Gmelin, but G. rugosa has prioritj- as a binomial 

 designation, and as several conchologists have already adopted 

 26 



