Barnes on the Genus Chiton, 71 



of hairs between the valves, at each joint of the shell. 

 Hairs, in the dried specimen, very brittle. 



Remarks. 



Mr. Dillwyn has not noticed this species, though 

 he quotes Enc. Method t. 163, f. 13 and 14 for the Chiton 

 Crinitus o( P enn an t ; and M. Lamarck quotes the 

 same plate f. 7 and 8 for this shell. 



See Anim, sans Vert. Vol. 6 p. 321. 



As the French Encyclopedia is a work to which few' per- 

 sons, in this country, can have reference, we subjoin a 

 new and accurate figure of the shell, drawn from nature, 

 by that excellent artist Mr. John Rubens Smith o( 

 New. York ; to whom our thanks are due for the elegant 

 figures illustrating this paper. 



4. Chiton Niger Fig. 3. Pi. 3. 

 Shell with eight concentrically striated valves- 

 and the margin furnished with elongated scales. 



Hab. Coast of Peru. Capt. Ridgely. 

 Cabinets of the Lyceum and Dr. Mitchill. 

 Length 2.h inches. Breadth 10 exclusive of the margin. 

 Breadth 1.5 including the margin. 

 Shell oblong oval, intermediate valves oblong ; colour 

 black or dark brown ; surface shining ; margin half as broad 

 as the shell, coriaceous and furnished with elongated, red- 

 dish white scales, or irregular and interrupted longitudinal 

 fidges. Animal pale green. 



Remarks. 



This shell is fragil though not thin, and has a coarse rough 

 appearance caused by the erosion of the back part of the 

 valves ; which are inhabited by a minute species of Lepas, 

 perhaps the Lepas stromia of Muller, and the Balanus 

 verruca ofBrugiere, having the shell white and the 

 operculum of only two valves. 



5. Chiton Echinatus. Fig. 4. PI. 3. 

 Shell with eight valves covered with a rough, 

 green epidermis, margin broad,coriaceous and spiny. 



Hab. Coast of Peru. C apt. Ridgely. 



