68 
HELIX. SNAIL-SHELL . 
thickened, often with a kind of silvery cast, not the least 
reflected: length usually an inch ; breadth five-eighths. 
Variety , with the lip white and somewhat expanded. 
Linn. Trans, viii. pi. 5. f. S*— Dorset Cat. pi. 19. f.30. 
Muddy places and ditches, v. v. 
69. Helix auricularia. JVids-mouthed Snail-shell. 
Lister , pi. 123. f. 22— Pennant , pi. 89. f. 4 — Da Costa, 
pi. 5. f. 17— Montagu, pi. 16. f. 2 — Donovan, pi. 51. f. 1~ 
j Dorset Cat. pi. 21. f. 17- 
Shell thin, brittle, semitransparent, rather conic and 
obtuse, light yellow, often covered with a darkish or rust- 
color skin; spires four, the first extremely large andcov 
\ vering nearly the whole of the shell, a little wrinkled loa- 
gitudinally, and often marked with a single deep impres¬ 
sion : aperture somewhat oval, vastly large; the outer-lip 
/ much expanded ; pillar-lip folded back and forming a slight 
•hollow behii.d it: length about an inch y breadth three- 
quarters of an inch. * 
Stagnant waters, v. v „ 
60. Helix limosa. Mud Snail-shell. 
Montagu, pi. 16. f. 1— Brown, JVern. Soc. pi. 24. f. 11. 
Shell thin, transparent, glossy, reddish-brown or horn* 
color: spires four, the first very large. In appearance it 
so much resembles the last, as to be considered a mere 
variety, or the young shell: but it is of a more oblong and 
tapering form, the first volution not so much swelling over 
the next at the junction, the volutions all more prominent 
and rounded, and deeply defined by the line of separation, 
and the aperture is narrower. 
Ditches, and muddy places, v. v . 
0 - 61. Helix tentaculata. Coverlid Snail-shell. 
Lister , pi. 132. f. 32— Pennant, pi. 89. f. 6— Da Costa , 
pi- 6 . f. 12— Donovan, pi. 93— Dorset Cat. pi. 21. f. 12. 
: The young shell. Walker, f. 33. 
Shell somewhat conic, rather obtuse, semitransparent, 
yellowish-white, often covered with a dark skin, nearly 
smooth: spires five or six, rounded and deeply divided, 
Hosed when alive with a strong concentrically striate lid: 
«• • aperture 
