12 CHITON. 



cinereus. 31. Shell with eight smooth carinated 

 reddish valves, and the margin somewhat ci- 

 liated. 



Chiton cinereus. Linnaus Syst. Nat. p. 1107. Fabricius 

 Fauna Grant, p. 423. Bom. Mus. p. 5. 1. 1. f. 3. Chem- 

 nitz, viii. p. 291. t. 96. f. 818. Schroeter Einl. iii. 

 p. 501. Gmelin, p. 3204. Dorset Catalogue, p. 25. t. 

 1. f. 4. Montagu Test. p. 3. Maton and Racket, in 

 Lin. Trans, viii. p. 22. t. 1. f. 3. Wood's Conch, p. 

 21. t. 3. f. 3. 

 Chiton laevis. Pennant's Zool. iv. p. 72. t. 36. f. 3. Gme- 

 lin, p. 3206. Montagu Test. p. 2. Maton and Racket 

 in Lin. Trans, viii. p. 21. Wood's Conch, p. 22. 

 Le Kalison. Adanson Senegal, p. 42. t. 2. f. 11. 

 Enc. Method, t. 161. f. 11. 

 Inhabits the rocks on the coasts of Goree. Adanson. Coasts 

 of Norway. Linnaus. Coasts of Britain, on rocks and 

 oyster shells. Pulteney, fyc. 

 Shell from one quarter to three quarters of an inch long, 

 oval, compressed, carinated, and nearly smooth ; the valves 

 project into a beak on the back, and are a little reflected 

 at the posterior angle of the base. Colour reddish, when 

 the inhabitant is alive, and cinereous when dried. In Mr. 

 Racket's edition of Pulteney's Dorset Catalogue C. lavis 

 of Pennant is referred to for the present species. 



tuberculatus. 32. Shell with seven tuberculated 

 valves. 



Chiton tuberculatus. Uinn&us Syst. Nat. p. 1106. Schroe- 

 ter Einl. iii. p. 494. t. 9. f. 19. Gmelin, p. 3202. 

 Wood's Conch, p. 22. 



Inhabits the coasts of America. Linntzus. West Indies. 

 Schroeter. South America. Wood. 



Shell slightly carinated, oblong-oval, with tubercles disposed 

 in a quincunx order; sides, grey mixed with white, and 

 marked with brown arcuated bands. Schroeter's figure, 

 which in the markings does not well answer to the Linnaean 

 description, is an inch and a quarter long, and about half as 

 broad. 



tessellatus. 33. Shell with seven striated greenish 

 valves, striped with black and white on the 

 back ; margin scaly. 



