tROCHUS. 797 



variously shaded with brown, and the body- whirl is obsolete- 

 ly studded with small white tubercles. 



MELANOSTOMUs. 89. Shell pyramidal, obtuse, and 

 greenish with transverse rows of dark dots ; 

 throat black. 

 Trochus melanostomus. Gmelin, p. 3581. 

 Trochus in fauce nigerrimus. Cheimitz, v. p. 29. t. l6l. f. 



1326. 

 Trochus, No. 12. Schroeter Einl. i. p. 683. 

 Inhabits the Southern Ocean. Chemnitz. 

 This shell, as figured by Chemnitz, appears to be eight lines 

 long, and equally broad, of a green colour with transverse 

 rows of blackish dots, and the throat black. 



STRiATUS. 90. Shell conical, with strong trans- 

 verse, and very minute oblique striae ; sutures 

 obsolete, and the inside pearly. 



Trochus striatus. Linnaeus Syst. I^ot. p. 1230. Chem- 

 nitz, V. p. 29. t. 162. f. 1527 and 1528. Schroeter Einl. 

 i. p. 670. Gmelin, p. 3579- Schreibers Conch, i. p. 

 257. Pulteney's Dorset Cat. p. 44. Montagu Test. p. 

 278, and Supp. p. 119. 

 Trochus exasperatus. Pennant Zool. iv. p. 126. 

 Trochus parvus. Da Costa Brit. Conch, p. 41. 

 Trochus conicus. Donovan Brit. Shells, v. t. 155. f. 1. 

 Trochus erythroleucos. Maton and Racket, in Lin. Trans. 



viii. p. 156. Dorset Cat. p. 48. t. 18. f. 2. 

 Lister Conch, t. 6l6. f. 2. , Gualter, t. 6l. f. N. 

 Inhabits the Mediterranean. Linnccus. Coasts of Britain. 



Da Costa, &jc. 

 Shell about three-eighths of an inch long, and a quarter of an 

 inch broad, generally of a pale greyish white, but sometimes 

 of a reddish colour, with interrupted longitudinal dark pur- 

 plish brown lines ; it has six flat whirls, and it is difficult to 

 discover the separating line. I think there can be no doubt 

 that this is the Linnaean T. striatus, and T. exiguus of 

 Montagu appears to me to be the T. erythroleucos of Gme- 

 lin. 



MINUTUS. 91. Shell conical, with obsolete crenu- 

 lated transverse striae, and a broader rib at 

 the margin of the whirls; summit crimson, 

 and the inside white. 



