788 TROCHUS. 



and 22. Chemnitz, v. p. 118. t. 172. f. 1688 to 1690. 

 Gmelin, p. 3584. Schreibers Conch, i. p. 259. 

 Trochus ouustus. Humphreys Port. Cat. p. 4, lot 31. 

 Trochus, No. 93. Schroeter Einl. i. p. 714. 

 Turbo tiochiformis. Born Index, p. 355. 

 La Fripiere. Favanne, ii. p. 411. t. 12. f . C 1 and C 2. 

 D'Jvi/a,t.6.{.M. 



Inhabits the coasts of St. Domingo. Favanne. China and 

 Guadaloupe. Humphreys. 



Shell commonly about an inch and a half long, and an inch 

 and three-quarters broad, with six remarkably rugged whirls 

 which over-lie each other, and of a brownish white colour ; 

 it has the singular faculty of affixing to its surface any ex- 

 traneous substance, and is often covered with stones, coral, 

 or the fragments of other shells, from whence it has derived 

 its common name of the Carrier. 



TECTUM. 70. Shell striated transversely, and lon- 

 gitudinally plaited, with the body-whirl ven- 

 tricose, and the spire depressed ; aperture 

 sub-orbicular. 



Trochus Tectum. Gmelin, p. S569. 



Trochus, No. 28. Schroeter Einl. i. p. 691. 



Tectum declive. Chemnitz, v. p. 53. t. 165. f. 1567 and 

 1568. 



Le Bossu. Favanne, ii. p. 153. t. 9. f. M 3. 



Lister Conch, t. 653. f. 51. Argenville, t. 6. f. Q. 

 Variety. Of a chestnut-colour without spots. 



Chemnitz, v. 1. 165. f. 1569 and 1570. 

 Inhabits the West Indies. Chemnitz. Coasts of the Isle of 



France. Favanne. 

 Shell about eight lines long and nine broad, and the body-whirl 



is twice as large as the spire ; the colour is white variegated 



with transverse rows of purplish brown spots ; a singular 



arched extension of the pillar projects from the inner lip of 



the aperture. 



PERLATUS. 71. Shell depressed, with transverse 

 unequally granulated striae, and the base 

 convex ; aperture roundish, with the inner 

 lip toothed, and the throat striated. 



Trochus perlatus. Gmelin, p. 3577. 

 Trochus Tectum, Var. Gmelin, p. 3569- 

 Trochus Modulus, Var. Gmelin, p. 3568. 



