368 . Binney's Monograph of the Helices 
_ Greatest transverse diameter rather more than half 
an inch. 
GrocnaPHicAL DisrRiBUTION. Noticed hitherto 
only in the upper parts of Alabama and Tennessee, 
pat ill probably be found in all the Southwestern 
States. 
Remarks. This is a beautiful and singular species. 
Its form is very much flattened above, and it is 
acutely carinated. The epidermis, in good speci- 
mens, is chestnut-colored, and covered with minute 
hairs; these are partially noticeable on the edge of 
the ari and suggested to Mr. Lea the specific 
name spinosa. The base is somewhat convex, and 
is temarkable for the long, narrow tooth, which, 
rising from an indentation of the umbilical axis, and 
running parallel with, and closely approximating to 
the lip, terminates near where the latter joins the 
body-whorl. The aperture is merely a narrow space 
left between this tooth and the lip, and is so small 
that it appears hardly possible that the animal should 
be able to pass through it. In some specimens there 
is an indentation in the lip about midway of it 
length, resembling slightly the cleft in the lip of 
Helix hirsuta, Say. I am not able to asce tain 
whether this be accidental or not. It does not ap 
peat in Mr. Lea’s figure; — , 
The aspect. of the base of this shell somewhat 
resembles that of Hexix hirsita, Say, but its superior 
size and carinated edges at once prevent its being 
considered the same. [t is indeed among the most 
distinetly marked of our species, and cannot be mis- 
taken for ni other. | 
