278 — New Species of Shells. 
ART. IV.—DESCRIPTIONS OF THREE NEW SPECIES OF 
SHELLS. By Jonn G. AxTHoNY. Communicated January and 
July, 1839. 
ANCULOTUS COSTATUS. 
Plate III. fig. 1. 
Shell subglobose, with a depressed convex spire; 
body whorl ventricose, with about five coste revolv- 
ing around it; color olivaceous ; aperture obovate ; 
base regularly rounded ; purplish within. 
Found on pebbly shores near the city of Cincin- 
nati. - 
3t 
e 
HELIX sTRIATELLA. 
Plate III. fig. 2. 
Shell remarkably thin, somewhat depressed; of a 
very delicate horn color, transparent ; whorls four, 
very finely striated transversely ; spire scarcely ele- 
vated ; suture moderate ; aperture nearly round; 
labrum not refiected nor thickened. Umbilicus not 
remarkably large, in diameter not equal to the body 
whorl ; transverse diameter one fifth of an inch. 
Found abundantly near Cincinnati, in low bottom- 
lands near the margins of running streams. 
From “ Helix perspectiva," Say, which it most 
nearly resembles, it may be readily distinguished by 
em number of volutions, its exceedingly delicate 
Strix, and its invariably smaller size. The color is 
also much lighter, and its whole appearance far more 
E > * 2 t 
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