CUMA. 201 



is sufficiently 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. PI. 62, fig. 826. 



Yellowish, frequently encircled by numerous narrow brown 

 bands; aperture white or orange within, sometimes incisely 



striate. Length, 1'25-1'75 inches. 



W. Coast of Africa. 



I have before me a specimen without tubercles, simply incisely 

 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 Purpura 

 callifera 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. trig(ia, 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, 1 '25-2*5 inches. 



W. Coast of Central America. 



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

 The adult is very gibbous and heavy. 



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 C. rugosa has priority as a binomial 

 designation, and as several conchologists have already adopted 



26 



