inhabiting the United States. 361 
Shell.. Slightly convey; epidermis dark russet or 
chestnut color, with numerous very minute, hairy 
projections ; whorls five to six, narrow, diminishing 
very. gradually in width, from the outer whorl to the 
apex ; aperture flattened, contracted by a deep groove 
behind the lip; Zip white, narrow, a little grooved on - 
its face, reflected, extending on the base to, and 
slightly contracting, the umbilicus, its outer edge not 
projecting above the surface of the whorl ; umbilicus 
open, deep, not exhibiting all the valutione, partially 
covered by the extended lip; &ase rounded, very 
much indented in the region of the umbilicus, with 
‘a compressed elongated. white tooth at the we of 
the: ‘aperture. 
` Greatest transverse dikriet, t nearly one nei of an 
ineh. 
GEOGRAPHICAL pug ‘Jnbabits the. New 
England States, in some. parts of which it is very 
common, and the States north of the Ohio River. 1t 
will probably be found in all the: Middle and Berti 
western States. 
. Remarks. This species has usually. been con- 
founded with HELIX fratérna, Sav, to which it is 
nearly allied ; but the differences are too striking to 
allow of their being considered identical. It is large- 
ly umbilicated, and the umbilicus is but very slightly 
encroached upon by the reflected lip, which only ex- 
tends to its edge. The umbilical region is deeply 
indented. The size of this shell is usually nearly 
twice as great as that of H. fratirna, though it is 
sometimes much smaller. 
In New Hampshire and Vermont, it is found in the 
VOL. III. — NO. II. 46 
