TROCHUS. 779 



vARlus. 47. Shell convex, obliquely umbilicated, 

 and the whirls slightly margined. 



Trochus varius. Linnaus St/st. Nat, p. 1229. Schroeter 

 Einl. i. p. 659. Gmelin, p. 3568. 



Inhabits the Meditenanean. Linnaus. 



Linnaeus has not given any reference, and in addition to the 

 above short character, only says that the shell is convex, sur- 

 rounded with an obsolete margin, and of a pale colour with 

 greyish bands. 



OBLiQUATUs. 48. Shell depressed, rounded at the 

 summit, and the whirls contiguous ; umbili- 

 cus large. 



Trochus obliquatus. Gmelin, p. 3575. Schreibers Conch. 



i. p. 247. 

 Trochus umbilicaris. Pennant Zool. iv. p. 126. t. 80. f. 



106. 

 Trochus umbilicalis. Da Costa Brit. Conch, p. 46. t. 3. 



f. 7 and 8. 

 Trochus cinerarius. Pulteney Dorset Cat. p. 44. Dono- 

 van, in. t. 74, three middle figures. 

 Trochus umbilicatus. Montagu Test. p. 286. Maton and 



Racket, in Lin. Trans, viii. p. 153. Dorset Cat. p. 48. 



t. 16. f. 7 and 8. 

 Trochus oblique radiatus. Chemtiitz, v. p. 11 7. t. 171. f. 



1685. 

 Trochus, No. 91. Schroeter Einl. i. p. 714. 

 Inhabits the Mediterranean. Chemnitz. Coasts of Great Bri- 

 tain. Pennant, S^c. 

 Shell about five-eighths of an inch long, and three-quarters of 

 an inch broad, of a whitish ash-colour, marked with rather 

 broad and somewhat oblique violet undulated rays ; it is near- 

 ly allied to 1'. cinerarius, but is much flatter, is of a dift'e- 

 rent colour, and has the rays invariably much broader. 



CINERARIUS. 49. Shell sub-conical, with the sum- 

 mit produced, and the whirls slightly convex ; 

 umbilicus small. 



Trochus cinerarius. Linnmis Si/st. Nat. p. 1 229. Pennant 

 Zool. iv. p. 127. Chemnitz^ v. p. 117. t. 171. f. I686. 

 Schroeter Einl. i. p. 659. Midler Zool. Dan. iii. p. 35. 

 t. 102. f. 1 to 4. Gmelin, p. 3568. Donovan, iii. t. 74, 

 upper and lower figures. Montagu Test. p. 284. 



