366 Binney’s Monograph of the Helices 
with numerous sharp, rigid hairs; whorls five, 
rounded; suture distinct; aperture very narrow, 
almost closed by an elongated, lamelliform tooth, 
situated on tbe pillar-lip, and extending from the 
centre of the base nearly to the junction of the lip 
with the outer whorl; lip narrow, very much dè- 
pressed, and reflected against the outer whorl, with 
a deep cleft or fissure near the centre of the inner 
margin; umbilieus wholly covered ; base convex. 
Greatest transverse diameter nearly one half of an 
inch ; ordinary size less than one fourth. 
noon EM. DisrRmuTrON. Inhabits the Midate 
and Western States, where it is common, and the 
New England States more rarely. In Massachusetts 
it is an uncommon shell. 
Remarks. This is a very peculiar species. The 
singular fissure on the inner edge of the lip distin- 
guishes it from every other. It is almost globular. 
There is sometimes a minute, tooth-like process on 
the upper and inner part of the lip, which is visible 
only on looking. into the aperture; and I have once 
or twice noticed a white band on the body-whorl. 
It is sometimes covered with a hairy) vesture on 
every part, at other times it is quite smooth. The 
reflection of the lip is sometimes so closely appressed 
to the outer whorl as to appear to be absorbed into it. 
. Wood has figured this and the preceding. species 
in the supplement to his Index T'estaceologicus, but 
. has caused great confusion by mistaking HELIX, fra- 
lérna, Sax, for Hetrx ménodon, Rackgrr, and. the 
present species for Henix fratérna, Say, which it 
resembles only in size. Another shell was described 
