OF NEW ENGLAND. 315 
This shell is recorded. as being found in Vermont by 
Professor Adams, though it cannot properly be regarded 
asa New England species. It is common at the West. 
Hewix ruiiernosis Binney. (Figs. 23, 24.) Shell thin, 
flattened above, nearly chestnut-color, sometimes a green- 
ish horn-color. Whorls four and a half; Figs. 23, 24. 
last whorl very large, suture slightly in- so 
dicated. Aperture large, nearly circular, 
within pearly. Lip simple, brittle, 
slightly thickened within by a testaceous 
deposit. Umbilicus not large. Diame- 
ter an inch or more. Animal blackish, 
or bluish black. On the tail there is a 
slit from which the mucus pours freely. 
This shell resembles somewhat that of 
Helix inornata, but differs in being much larger, and 
always having one whorl less. The umbilicus is larger, 
and the aperture is more circular. 
This species occurs in nearly all the States east of the 
Rocky Mountains. It is extremely rare in New England, 
having been found only in the extreme western limits. 
Of the species thus far described in these papers, only 
three of them can be considered as really common in New 
England, namely, Helix albolabris, monodon, and alternata. 
The others are rarely to be met with. It is difficult for 
the collector to obtain more than ten or twelve specimens 
of the larger species in a day’s ramble, though at the West 
they may be found by hundreds. The cause of this dis- 
parity in numbers is attributed to the abundance of lime- 
rock at the West; this rock favoring the multiplication 
of shell-bearing mollusks, while in New England, granitic 
formations prevail, and the soil from such rocks retards 
the increase of these animals. — To be continued. 
