HELIX. SNAIL-SHELL. 35 
Shell dark horn-color, with often a yellowish or reddish 
tinge, smooth, finely polished, transparent: spires six, a 
little taper and rounded, ending somewhat obtusely : aper¬ 
ture oval, with a" thick margin, not reflected nor forming 
afiy perforation: length about a quarter of an inch ; breadth 
the third of its length. 
We cannot agree with Mr. Dillwyn, that this shell and 
the H. subcylindrica are individually the same. In ditches 
or water)’ places we have never found them, nor, accord¬ 
ing to our own experiments, will they live longer in fresh 
water than other similar inhabitants of dry situations. 
Their favourite habitats are at the roots of trees which are* 
generally carpeted with fine moss ; under stones, where 
they retire for shelter in the autumn ; but more especially 
in dry elevated pastures above the sea, where we have col¬ 
lected them in abundance after tiie hay has been carried 
of the fields, and whence they are washed down into the 
sands. When first gathered they are of a blackish horn- 
color, with a reddish gloss about the lip 3 but'after much 
exposure to the weather, when dead, they become dull 
| white and opake. v. v. 0 ' ' ' ‘ 
E. Shell otial, without perforation , 52 to 65. 
% 52. Helix stagnalis. Lake Snail-shell. Fig. 69. 
titter, pi. 123. f. 21— Pennant, pi. 89. f. 1— Da Costa , 
[1. 5. f. 11— Montagu, 'pi. 16. f. 8 -— Donovan, pi. 51. f. 2—■ 
Dmet Cat. pi. 21. f. 11. 
Shell very thin and brittle, transparent, horn-color, often 
covered with a rough greenish coat, and varying to whitish 
cr dusky, tapering to a fine point: spires six or seven* 
the first very large and tumid, striate longitudinally, and 
crossed by a few faint distant transverse ribs, giving it a 
rather angular appearance, or as if pieces here and there had 
been lightly shorn off 5 the other volutions rounded but sud- 
1 denly tapering: aperture very, large, oval* the inner-lip 
folding and forming a kind of rib down the pillar on the in-^ 
side: length nearly two inches $ breadth about one. 
Stagnant waters, v. v. 
53. Helix fragilis. Brittle Snail-shell , 
Montagu, pi. 16. f. 7 . 
