778 TROCHUS. 



dinal dull purplish-brown stripes ; some of the granules are 

 said to be white, and others flesh-coloured, and the base as 

 well as the sides is granulated. 



SCABER. 44. Shell sub-ovate, with transverse bead- 

 ed grooves, which are alternately larger. 



Trochus scaber. Limiaus Si/st. Nat. p. 1229-? Chemnitz, 

 V. p. 107. t. 171. f. 1667. Schroeter Einl. i. p. 658. 

 Gmeiin, p. 3568. 



Inhabits 



Linnaeus has described this shell to be the size of a pea, 

 with four or five rounded whirls separated by a deep groove, 

 and the aperture rounded and striated within : he has quoted 

 Argenville, t. 11. f. T (i. e. t. 8. f.T of the second edition), 

 but it differs materially from his description, and is probably 

 either T. costatus, or T. inaqualis; the shell which Chem- 

 nitz has figured is half an inch long, and about equally broad. 



QUADRATus. 45. Shell sub-ovate, tessellated, and 

 transversely striated, with the whirls shelving 

 at the upper margin, and more perpendicular 

 below. 



Trochus tessellatus. Chemnitz, v. p. 1 16. t. 171. f. l683. 



Gmeiin, p. 3574. Schreibers Conch, i. p. 246. 

 Trochus, No. 88. Schroeter Einl. i. p. 712. 



Inhabits the Mediterranean, frequent. Chemnitz. 



Shell about eight lines long and nine broad, of a brownish ash- 

 colour, with numerous transverse rows of dark square spots. 

 Gmeiin has another species with the name of tessellatus. 



CROCEUS. 46. Shell convex, with convex whiils, 

 of which the lower are pale chestnut and the 

 upper of a saffron-colour. 



Trochus croceus. Gmeiin, p. 3584. Schreibers Conch. 

 i. p. 247. 



Trochus crocatus. Chemnitz, v. p. 116. t. 171. f. l684. 



Trochus, No. 89. Schroeter Einl. i. p. 713. 

 Inhabits the coasts of Morocco. Chemnitz. 

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



eight lines long and nine broad, with the two lower whirls 



of a pale chestnut, and the upper ones of a saffron-colour. 



T. crocatus of Born is described to be imperforate. 



