70 AMERICAN JOURNAL 



DESCRIPTION OF A NEW SPECIES OF CSPRiEA. 



BY S. R. ROBERTS. 



C. polita, Roberts. — Plate 15, figs. 1, 2, 3. 



Description. — Shell ovate, extremities slightly produced, and 

 pitted, pale fulvous, thickly ornamented with small white spots, 

 slightly marginate, margins pitted, the pittings orange ; base 

 white, slightly convex ; aperture flexuose, teeth small, those on 

 the outer lip regular, about twenty-one in number, a little darker 

 than the base of the shell. The teeth on the columella are 

 smaller, and for a short distance from either end extend over 

 the base of the shell, while the others are confined to the margin 

 of the aperture. 



Dimensions. — Length | in. ; diam. §• in. 



My cabinet, and cabinet Acad. Nat. Sci. 



Remarks. — The younger shell is of a bright citron color, with 

 occasional spots of white, giving some specimens a half-clouded 

 appearance ; the base is of an opaline white. This shell has 

 been confounded with the C. citrina of Gray. The peculiarities 

 of 0. citrina, according to the original description in the Zool. 

 Jour., vol. i, p. 509, are : base orange, margin tliickened, orange, 

 teeth pale, small, close, and nearly similar. 



This shell has a white base, margin not orange, but white, the 

 pits only being orange. The figure of C. citrina, in Kiener is 

 nothing more than a C. helvola, Linn. 



C. polita differs from 0. spurca, var., not only in general 

 shape, but also in the size of the teeth, as well as their distribu- 

 tion on the base of the columella. 



A number of specimens of this species belonging to the 

 Academy have the half-clouded appearance spoken of in the 

 description. Some are semicylindrical in shape, but the mar- 

 gins and arrangement of teeth of all are alike. 



Most of the specimens in the Coll. of the Academy are believed 

 to have come from the Sandwich Islands. 



