794 TROCHUS. 



Inhabits the Mediterranean. Chemnitz. 



This shell is of about the same size, and appears to be nearly 

 allied to T. Labeo ; it may, however, be readily distinguished 

 by its having on each whirl four transverse muricated keels, 

 which are much broader, and more elevated than the other 

 ribs. 



TESSELLATUS. 83. Shell ovate, with transverse dis- 

 tant ribs ; outer lip somewhat double, and 

 the pillar obsoletely toothed. 



Trochus tessellatus. Chemnitz, v. p. 63. t. l66. f. 1583. 

 Gmelin, p. 3583. Ulysses s Travels, p. 467. 



Trochus tessulatus. Born Mas. p. SoQ,. t. 12. f. 5 and 6. 



Trochus, No. 32. Schroeter Einl. i. p. 693. 

 Inhabits the coasts of St. Croix. Chemnitz. Bay of Naples. 



Ulysses. 

 Shell about nine lines long and eleven broad, and has the spire 



less elevated than m either of the three preceding species ; 



the transverse ribs are channelled on the upper, and convex 



on the lower edge, with their interstices smooth ; the colour 



is yellowish white, tessellated with blackish purple ; the 



white inner margin of the lip is not grooved, and there is 



some faint appearance of an umbilicus. 



TURBINATUS. 84. Shell ovate, smooth, and the 

 whirls convex ; outer lip somewhat double, 

 and the pillar obsoletely toothed. 



Trochus turbinatus. Born Mus. p. So5. 

 Variety A. More or less checquered with transverse rows of 



dark spots. 



Trochus tessellatus, Var. Chemnitz , v. p. 64. t. 166. f. 

 1584. Gmelin, p. 3584. 



Trochus, No. m. Schroeter Einl. i. p. 693. 



Trochus, No. 7B. Schreibers Conch, i. p. 258. 



Le Damier. Favanne, ii. p. 107. t. 9- f. E 1. 



Bonanni Rec. and Kirch. 3. f. 201. Lister Conch, t.642. 

 f. SS and 34. Gualter, t. 63. f. D, E, and G. Klein 

 Ost. t. 2. f. 53 and 54. Knorr, i. t. 10. f. 6. Adanson 

 Senegal, 1. 12. f. 1. Geve. t. 20. f. 198 and 200. 

 Variety B. With dark longitudinal undulated stripes. 



Trochus citrinus. Gmelin, p. 3584. 



Trochus Labio, Var. $. Gmelin, p. 3578. 



Trochus, No. 34. Schroeter Einl. i. p. 694. 



La Fraise sauvage. Favanne, ii. p. 110. t. 9- f. E 2. 



Knorr, i. t. 10, f. 7. 



i 



