CHITON. 23 



TESSELLATED CHITON. 



34. Chiton tessellatus. Ch. testa septemvalvi striata, viridescente, cor- 

 pore s qua mo so > dorso strigis albidis et nigricantibus distincto. Chem. 

 Conch. 10. t. 173. f. 1690. 



Shell of seven valves, striated, greenish, body scaly, back marked with 

 black and white stripes. 



Encyclop. Method, pi. 162. f. 10. 



The extreme valves of this species, and the marginal 

 triangles of the middle valves, are so striated as exactly 

 to resemble mosaic work ; the trivial name of tessellated, 

 therefore, suggested by Dr. Leach, is very appropriate. 

 The back of the shell is bistre, the tessellated parts ver- 

 digrease green, the margin scaly, with green and white 

 bands. 



HAIRY CHITON. 



35. Chiton crinitus. Ch. testa septemvalvi, pilis brevibus dense obsita. 



Linn. Gmel. p. 3206. 

 Shell of seven valves, thickly covered with short hairs. 

 Penn. Br. Zool. ed. 1812. 4. p. 142. pi. 39. f. 1. A. 1. Encyclop. 



Method, pi. 163. f. 13. 14. Mont. Test. Brit. p. 4. Linn. Trans. 8. 



p. 20, 



We have Pennant's authority only for the existence of 

 this species, which is extremely rare. Mr. Boys is 

 said to have found it at Sandwich, but from the long 

 and close habits of intimacy which the author enjoyed 

 with that gentleman, he can safely state that the shell 

 was not in his possession. Mr. Pennant says that it 

 inhabits the sea, near Aberdeen, and is five-eighths of an 

 inch long. The figures in the French Encyclopedia are 

 copied from Pennant. 



