836 TURBO. 



Shell about two inches and a half long, and two inches broad, 

 of a yellowish white colour mottled with brown, or some- 

 times variegated with chestnut spots ; it is strongly ribbed 

 transversely, and slightly wrinkled obliquely, and has five ra- 

 ther remarkably convex whirls, which are separated by a 

 broad canal at the suture ; the canal is more or less radiated 

 with darker spots ; the inside is white, and somewhat silvery. 



CASTANEUS. 46. Shell transversely striated with 

 larger and smaller rows of beaded granules, 

 and of a chestnut-brown colour marbled with 

 white. 



Turbo castaneus. Gmelin, p. 3595. Schreibers Conch, i. 



p. 282. 

 Castanea Indias Occidentalis. Chemnitz, v. p. 211. 



Variety A. Transversely striated, and some of the striae granu- 

 lated. 



Turbo, No. 35. Schroeter Einl. ii. p. 75. 

 Chemnitz, v. 1. 182. f. 1807 and 1808. 



Variety B. With the beaded striae crowded, and alternately 

 larger. 



Turbo, No. 3Q. Schroeter Einl. ii. p. 75. 

 Chemnitz, v. 1. 182. f. 1809 and 1810. 

 Geve, t. 16. f. 150. 



Variety C With the beaded striae alternately larger, and ra- 

 ther remote. 



Turbo mammillatus. Donovan, v. t. 173. Maton and 

 Racket, in Lin. Trans, viii. p. l66. Montagu Supp. 

 p. 126. 

 Turbo, No. 37. Schroeter Einl. ii. p. 76. 

 Geve, t. 16. f. 152. Chemnitz, v. t. 182. f. 1813 and 1814. 



Inhabits the West Indies. Chemnitz. Has been picked up on 

 the Scilly Rocks, at the western extremity of Cornwall. Da 

 Costa. 



Shell about an inch long, and ten lines broad, of a chestnut- 

 brown colour, marbled with a few irregular large white 

 spots, and the aperture white ; it has five convex whirls, 

 studded with transverse rows of beaded granules, which are 

 more or less regularly alternately larger. 



CRENULATUS. 47. Shell with transverse crenulated 

 striae and rows of granules, and of a silvery 

 grey colour with greenish spots. 



