HELIX. SNAIL-SHELL. 
40 
11. Helix fontana. Fountain Snail-shell. 
Montagu , pi. 6. f. 6 —Dorset Cat. pi. 19. f. 19. 
Shell very flat, hom-color, transparent, smooth, a little 
concave in the ceutre on both sides, but more deeply and 
distinctly so on one side : spires four, a little concave in the 
centre on both side3, but more distinctly so on one; the outer 
volution with a faint ridge-like appearance, formed by the 
, gradual slope of the primary volution on each side: aperture 
I contracted, half oval, a little pointed at the top, oblique, the 
edges very thin and taking in half the body volution at their 
point of contact: diameter hardly two tenths of an inch. 
In fresh waters : not common, v. v. 
12. Helix Ericetorum. Heath Snail-shell. a. Cash. /1 4-£-8 
Lister , pi. 78. f. 78— Pennant , pi. 88. f. 5— Montagu, 
pi,24. f. 2— Donovan, pi. 151. f. 2 —Dorset Cat. pi. 20. f. 8. 
Shell semitransparent, a little convex on one side, with 
a large and deep perforation on the other: spires six or 
seven, well defined, the primary one large and finely 
rounded, s riate across : color whitish or grey, often pale jflj 
rufous, with mostly a brown band on the upper part of theijg 
larger volution which continues round the edge of then'- 
smaller ones, and frequently several small girdles at the\^ 
base ; sometimes it is variegated with brown, the bands 
often lighter and more transparent, and sometimes they are 
hardly discernible: the tip or termination of the spires 
dark polished brown: aperture somewhat orbicular, slight¬ 
ly crescent-shaped, attached half way down the body volu¬ 
tion: diameter nearly an inch. 
Dry sunny banks, and warm walls, v. v. 
13. Helix cingenda. Banded Snail-shell. 
Litter, pi. 78. f. 10 — Montagu, pi. 24. f. 4— Pennant, 
pi. 88. f. 2— Linn. Trans.v iii. pi. 5. f. 6 ‘—Dorset Cat. pi. 18. 
f.5. 
Shell semitransparent, rather convex, reddish or yel¬ 
lowish-white, with numerous narrow spiral zones of a ches- 
nut or chocolate-brown color placed at irregular distances, 
hut generally divided into sets of three or four each by 
broader whitish bands, and often interrupted so as to form 
short streaks, especially towards the top, where they be- 
f come 
