TROCHUS. 787 



rate, and the species is every way involved in so much ob- 

 scurity, that I have thought it undeserving of notice. 



iNERMis. 07. Shell convex-conical, with longitudi- 

 nal plaits ending in short spines ; aperture 

 compressed, and the umbilicus sub-consoli- 

 dated and wrinkled. 



Trochus inermis. Gmelin, p. 3576. 



Trochus Solaris Indiae Occidentalis. Chemnitz, v. p. 135. 



t. 173. f. 1712 and 1713. 

 Trochus, No. 100. Schroeter Ehil i. p. 7 J 9. 



Inhabits the West Indian Seas. Chemnitz. 



This shell, as it is figured by Chemnitz, appears to be about 

 eleven lines long, and fifteen broad, of a greenish yellow co- 

 lour, and the longitudinal plaits nearly white ; the longitudi- 

 nal plaits terminate at the margin in short processes, which, 

 however, have not much the appearance of spines. 



iMPERiALis. 68. Shell convex-conical, sub-ventri- 

 cose, witli transverse somewhat scaly striae, 

 and the whirls spinous at their margins. 



Trochus imperialis. Gmelin, p. 3576. Schreibers Conch. 



i. p. 248. 

 Trochus Solaris imperialis. Chemnitz, v. p. 135. t. 173. f. 



1714 and t. 174. f. 1715. 

 Trochus Heliotropium. Martyn Univ. Conch, t. 30. 

 Trochus, No. 101. Schroeter Einl. i. p. 720. 

 Turbo echinatus, Var. Gmelin, p. 359 !• 

 L'Eperon royal. Favanne, ii. p. 408. 



Inhabits the coast of New Zealand. Martyn, £^c. 



Shell nearly two inches and a half long, and four inches broad, 

 with seven whirls, of a dark olive-brown colour tinged with 

 violet ; the base is whitish, with a large umbilicus, and the 

 inside pearly ; the spines at the base and margins of the 

 whirls are broad, and shaped somewhat like the serratures 

 of a saw : Favanne says that the operculum is rather pearly 

 on its outer surface. 



coNCHYLiopHORus. 09. Shell conical, snb-uinbili- 

 cated, coarse, obtusely plaited, pellucid, and 

 the whirls tiled ; base concave, and the pillar- 

 lip sickle-shaped. 

 Trochus conchyliophorus. Born Mus. p. 333. t. 12. f, 21 



