Barnes, on the Genus Chiton. 7t 
of hairs between the valves, at each joint of the shell. 
Hairs, in the dried specimen, very brittle. 
New.York; to whom our thanks are due for the elegant 
figures illustrating this paper. 
4. Curron Nicer Fig. 3. Pl. 3. 
Shell with eight concentrically striated valves: 
and the margin furnished with elongated scales. © _ 
Hab. Coastof Peru. Capt. Ridgely. 
Cabinets of the Lyceum and Dr. Mitchill. 
Length 2.5 inches. Breadth 1.0 exclusive of the margin. 
readth 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 
ridges. Animal pale green. 
Remarks. 
This shell is fragil though not thin, and has a coarse rou 
appearance caused by the erosion of the back part of the 
valves; which are inhabited by a minute species of Lepes, 
perhaps the Lepas strémia of Muller, and the Balan 
verruca of Brugiére, having the shell white and the 
operculum of only two valves. 
5. Cuiton Ecurnatus. Fig. 4. Pl. 3. 
Shell with eight valves covered with a rough, 
green epidermis, ern broad,coriaceous and spiny. : 
ab. Coast of Pere. Capt. Ridgely =~ 
