CHITON*. 



BI8TRIATED CHITON. 



2. Chiton bistriatus. Ch. testa octovalvi, bistriata, margine squamuloso. 

 Shell of eight valves with double stria?, margin scaly. 

 Chiton squamosus. Chem. Conch. 8. t. 94. f. 788 — 791. Chem. Chiton 

 t. 1. fig. 1. 



The two extreme valves are greenish ash colour dotted 

 with brown, the middle valves are red brown, with double 

 curvilinear striae of equal strength from the dorsal ridge 

 to the margin. The marginal triangles are marked with 

 dark brown spots on a light bluish-green ground ; mar- 

 gin scaly, fasciated with bistre. 



This shell is so evidently different from the true 

 Chiton squamosus, that the propriety of its separation 

 must be obvious. It may be presumed that Chemnitz 

 was not in possession of the dark green shell described 

 by Born and others. 



TAWNY CHITON. 

 PL 1./. 2. 



3. Chiton fulvus. Ch. testa octovalvi striata, striis albidis, lineato punc- 



tatis, limbo coriaceo. 

 Shell of eight valves, striated, striae in whitish dotted lines, margin 



coriaceous. 

 Chiton candidatus Gaditanus. Chem. Conch. 10. t. 173. f. 1691. 

 Encyclop. Method. Art. Vers. pi. 161. f. 4, 5. 



The middle valves, in this shell, are marked on the 

 dorsal triangles with numerous whitish lines occasionally 

 running into each other. These striae, when magnified ap- 

 pear moniliform, or like strings of minute white beads : the 

 marginal triangles are also striated but not beaded. The 

 extreme valves are marked like the middle ones. Ge- 



