283 ■ . 



ly, orannulaled with black: eyes at the bafe of the tenta- 

 cula behind, placed on fhort, broad pedicles: margin of 

 the body, above the fujlentaculum, f urnifhed with a fcal- 

 loped, fin-like membrane; beneath which, on each fide, are 

 three long filiform appendages anntilated with black, that 

 are continually in motion: behind ihe left eve is a fort of 

 plume, compoled of feveral fimple contiguous fibres. 



■■^>*- 



/ ' 



Trochus Magus. Lin. Syji. p. 122S.— GmeL Syji. p. 3567. 7. Magus, 



Lijier Conch, t. 640. f. 32 ? 



Chem. Conch, v, t. 171. f, 1656 to 1660. 



Br. Zool. t.SO. LlOl.—Turt. Lin. iv. p.462. 



Pnlt. Cat. Do'fd. p. 44. 



Don. Br. Shells, i. t. S. f. 1. 

 Trochus tuberculatus. Da Cojla. p. 44. t. 3. f. 1. 1. 



T. with five or fix, tumid, but rather deprefi'ed voluti- 

 ons, marked by a deep feparating line, and terminating 

 in a very fine point: the volutions are wrought with fine 

 fpiral ridges, orllrije, and the upper part of e^xh undated, 

 or tuberculated, moft confpicuous in the tv\^o largeft : co- 

 lour various, but moft times white, or blufh, elegantly 

 marked with undulated ftripes and blotches of crimfon, 

 purple, or chefnut-brown ; and fometimes prettily fpotted 

 all over with pink; aperture cornprelTed, angulated: um~ 

 bilicus large and deep. Size, ufually about an inch di- 

 ameter at the bafe, and three-quarters oF an inch high; 

 fometimes, though rarely, an inch and a half broad. 



O o 2 The 



