from Chili. 201 



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

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

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

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

 observation ; like many Patellce they are sometimes at such a dis- 

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

 some considerable part of their existence apart from it. 



6. Chiton glaucocinchis. 



C. testa oblongo-ovata, lajvissima, subrufil, alternatim glauco- 

 fuscoque strigata ; valvis, prim& et ultima, radiatis ; margine 

 cameo, 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, 

 with brown spots. 



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

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

 have however some doubts of its being adult, 



7. Chiton granulosus. 



.C. testa angusta, minutissime granulate, fujco-marmorata ; dorso 

 acutiusculo, elevato; valvis dorsalibus convexiusculis. 



Tab. Supp. XVIL f. 3. 



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

 bled : 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 Calyptrcea in Conception Bay : very rare. The two 

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

 have been noticed. 



