354 Binney’s Monograph of the Helices 
Shell. Depressed ; epidermis dark-brown or chest- 
nut eolor, and rough with minute acute projections 
and, stiff hairs ; whorls five, flattened above and 
rounded below, with numerous very fine oblique 
stris ; aperture three-lobed, much contracted by the 
lip and teeth; Zip white, sometimes edged with 
brown, widely reflected, with two projecting teeth 
on the inner margin ; the one near its junction with 
the body-whorl, acute and prominent, the other in 
the base of the aperture, long, lamellar, and but lit- 
tle prominent ; pillar-lip with a very prominent, 
white, curved tootli, projecting nearly perpendicular- 
ly from the shell, and forming: one boundary of the 
aperture ; umbilicus covered with a white callus, the 
continuation of the reflected lip ; base convex. 
Greatest transverse diameter, nearly one inch. 
GrocrapHicaL Distrisution. Inhabits all the 
Northern and Western States, and the Atlantic States 
as far south as South Carolina, and’ probably may be 
found in every State of the Union, and in Canada; 
It is most common in the Western ee where it 
attains its greatest size. 
Remarks, This is a remarkable piil 
distinguished from every other by its rough, hairy 
exterior, prominent falciform tooth on.the columella, 
and contracted, trilobate aperture. As in all other 
imperforate species with reflected lips, the umbilicus 
remains open until the lip is completed, and of course 
the young shells are destitute of the most. striking 
characteristics as above described. It resembles H. 
tridentata, Sav, in its upper surface so much, that, 
when placed side by side, they might be considered 
