FAMILY CHITONIDJE CHITON. 165 



C. fulminatus. (Couthouy, Bost. Journ. Vol. 2, p. 80, pi. 3, fig. 19. Pl. 10, fig. 199 of this work.) 

 Shell ovate-oblong, rather flat; the valves carinate and slightly beaked, covered with microscropic 

 granulations arranged in quincunx : margin pubescent. Color, brownish or yellowish red, with 

 white points along the posterior margins of the valves. Length, 0'7; width, 0-45. Stomachs of 

 fishes. Mass. 



C. ruber, Lowe. (Gould, Op. cit. fig. 24.) Shell small, oval, elevated, carinated ; surface smooth 

 under the lens, except the lines of growth ; valves strongly beaked. Color, light brick red or 

 flesh-color under a blackish pigment ; interior bright rose red. Allied to fulminatus, but distin- 

 guished by its impunctured surface. Found in fishes, and attached to stones in deep water. 

 Massachusetts. 



C. emersonii. (Couthouy, Bost. Jour. Vol. 2, p. 83, pl. 3, fig. 10. Pl. 10, fig. 198 of this work.) 

 Shell ovate-oblong, broadest behind : valves reniform, each with a central heart-shaped area, with 

 bead-like granules or tubercles in concentric series round the margin, the remainder covered with 

 a soiled downy membrane ; marginal membrane with series of yellow hairy tufts. Color, whitish. 

 Length, 0-8; width, 0*5. Allied to C. vestitus, Sowerby. Stomachs of fishes taken in Massa- 

 chusetts bay. 



