CH^ETOPLEURA. 37 



end valves pink, the central areas buff, and each valve has a trian- 

 gular black patch at the dorsal ridge. The girdle is alternately 

 buff and pink. 



C. CANDISATUS Shuttleworth. Unfigured. 



Shell elliptical, convex, dull waxen, the back sometimes banded 

 with white ; terminal valves having large white granules, which are 

 much elevated, sparsely and somewhat concentrically arranged. 

 Median valves subcarinated, the central areas having smaller whit- 

 ish granules, arranged in straight necklace-like series, crowding at 

 the umbones ; lateral areas conspicuously elevated, having large, 

 remote, irregularly placed granules. Entire surface covered with a 

 very minute, chaffy puncticulation. Girdle narrow, waxen, marbled 

 with pale brown; chaffy-pustulose, and having pellucid, corneous 

 white setse here and -there, especially at the insertions of the valves. 



Length 8-9, breadth 4*-5 mill. 



Guadeloupe, on dead valve of Cardium serratum. 



Chiton (Chwtopleura) candisatus SHUTTL., Jour, de Conch. 1856, 

 p. 168. 



Apparently closely resembling C. apicidata Say, in pattern of 

 sculpture. 



C. JANEIRENSIS Gray. PI. 13, figs. 59, 60. 



Shell oblong, elevated, rather narrow ; dorsal ridge somewhat 

 angular, olive-ashen or brownish ; strongly sculptured, the mucro 

 in front of the middle, rather prominent. 



Lateral areas strongly elevated, sculptured with four coarse, 

 granoseribs; anterior valve having 11 to 18 such ribs, usually 

 having a tendency to be in pairs or to split. Central areas having 

 about 12 granose acute threads on each side of the jugum, parallel 

 with it. 



Interior white, sutural plates rounded ; sinus shallow ; anterior 

 valve with 10, median valves 1, posterior valve 9 slits. Teeth solid, 

 eaves wide, solid. 



Girdle having a few delicate short hairs. 



Length 18, breadth 9 mill. 



Gills reaching the neck. 



Key West, Florida, to Rio Janeiro, Brazil. 



Chiton janeirensis GRAY, Spicil. Zool. p. 6, t. iii, f. 8, 1828. 

 SOWB., in Zool. Beechey's Voy., t. 40, f. 2. REEVE, Conch. Icon. 



