from Chili. 201 



Length 1| inches, breadth \^^. This new species is found 

 plentifully at Valparaiso in the fissures of the rocks, but generally 

 put of the reach of the breakers : the habits of this species are 

 yery different from those of the others which have come under my 

 observation : like many Patellce they are soinetimes at such a dis- 

 tance from the water as would lead one to suppose that they pass 

 Bome considerable part of their existence apart from it. 



p. Chiton glaucocindus. 



C, testg, oblongp-ovata, lajvissim^, subrufa, alternatim gUuco- 

 fuscoque strigat^; valvis, prima et ultima, radiatis; margine 

 carneo, fusco-maculato. 



Tab. Supp. XVII. f. 2, 



Shell oblong ovate, reddish, marked with alternate brown and 

 greenish blue stripes. Valves eight, the first and last radiated; 

 dorsal valves smooth, divided into two parts by a transverse ridge; 

 posterior compartment grooved. Border broad, granulate, pink, 

 yvMh brown spot§. 



Length four-tenths of an inch, breadth one quarter. A solitary 

 specimen of this elegant little shell was found at Valparaiso. I 

 liave however some doubts of its being adult. 



7. Chiton granulosus, 



|C. tests, angusta, minutissime granulata, fusco-marnjorata ; dorso 

 acutiusculo, elevato ; valyis dorsalibus convexiusculis. 



Tab. Supp. XVIL f. 3. 



Shell narrow, granulated, granulations very fine, brown, mar- 

 jbled ; back acute, elevated. Valves eight; dorsal valves a little 

 convex, not divided into compartments. Border narrow, covered 

 with rather coarse granula of the same colour as the shell. 



Length five-twelfths of an inch, breadth one-fifth. Found at- 

 tached to a Calyptrcca in Conception Bay ; very rare. The two 

 specimens in my collection are, I believe, the only ones which 

 have been noticed. 



