64 
HELIX. SNAIL- SHELL. 
48. Helix octanfracta. Eight-spired Snail-shell 
Pennant, pi. 89. Y. 5, not sufficiently taper nor elongated. 
— Montagu, pi. 11. f. 8 — Dorset Cat. pi. 18. f. II. 
Shell finely tapering to a point, semitransparent, covered 
with a tenacious blackish skin, under which it is whitish 
horn-color and polished ; spires eight or nine, rather flat 
hut well defined, obscurely striate or wrinkled longitudi¬ 
nally ; the larger volution with a few transverse ridges: 
aperture narrow-oval, contracted to a point at top; the 
outer-lip very thin ; inner-lip forming a ridge-like projec¬ 
tion near the base, without the least trace of reflexion or 
perforation : length five eighths of an inch; breadth barely 
two eighths. 
Cornwall and Devonshire, in still waters : rare, v.m. 
49. Helix Laclfhamensis. Wiltshire Snail-shell. 
Montagu, pi. 11. f. 3, 
Shell oval-oblong, semitransparent, dull rusty-brown, 
varying to horn-eolor and grey: spires seven, nearly flat, 
but well defined, the first three or four of which are tu¬ 
mid, the rest suddenly tapering to an obtuse point, longitu¬ 
dinal ly wrinkled : aperture whitish or with a purple tinge, 
somewhat oval, margined and reflected; the inner-lip 
turned bach so as to form a linear cavity behind it: length 
five eighths of an inch; breadth a quarter. 
Lackham and Bow woods, Wiltshire : rare. v. m f 
50. Helix obscura. Dusky Snail-shell. 
Montagu, pi. 22. f. 5 — Linn. Trans, viii. pi. 5. f. 11— 
Walker, f. 41— Dorset Cat. pi. 1.9. f. 27. 
Shell oval-oblong, rather obtuse, opake, brown horn-co¬ 
lor : spires from five to seven, a little rounded and very well 
defined, obliquely wrinkled : aperture nearly oval, with a 
white polished reflected margin, forming a groove behind 
the pillar: length half an inch; breadth about a third of 
its length. 
Woods, and under stones, v. v . 
51. Helix Jubrica. Varnished Snail-shell. 
Pennant, pi. 85. f. 4— Da Costa, pi. 5. f. 18— Montagu, 
pi. 22. f. 6— Linn. Trans, viii. pi. 5. f. 12— Dorset Cat. 
pi. 21 . f. 18. ' 
Shell 
