HELIX. 
117 
Planorbis obvolutus. Poir. Prod. 89. — Helix obvoluta. Muller- 
Verm. 27.; Lindsay.^ Trans. Linn. Soc. 765.; Forbes and 
Hanley .,'B. M. iv, 63. t. 117. f. 1, 2, 3. — Helix bilabiata. Oliv. 
Ad. 177. — Helix trigonophora. Lam. Journ. N. II. t. 42. f. 2. 
— Helix bolosericea. Gmel. (not Studer; Drop. Moll. t. 7. f. 
27. 29.; Brard, Moll. 62. t. 2. f. 16, 17.; Rossm. Icon. 69. t. 
1. f. 21.; Ferus. Hist. t. 51. f. 4. — Helix (Helicodonta) obvo- 
luta. Ferns. Prod. n. 107., Hist. t. 51. f. 4. — Helicodonta 
obvoluta. Risso, Fur. Merid. iv. 65. — Trigonostoma obvo- 
lutum. Fitz. Syst. 98. — Gonostoma obvolutum. Held. Isis., 
1837, 915. — Vortex obvoluta. Beck, Ind. 29. 
Inhab. shady woods, among the moss near the roots 
of trees, in Ditcham Wood, near Biiriton, Hants. 
{Dr. James Lindsay^ Probably introduced, but is 
now naturalised. 
Animal shagreened, foot grey, neck blackish ; ten- 
tacles black, upper long, lower very short. {Sturm^ 
t. 17.) Jaw moderate, striated in front, crenulated 
on the edge; epiphragm rather solid, flat, snow- 
white. 
The shells in living specimens are thickly covered 
with very fine hairs, which are so extremely brittle 
as to render it a matter of great difficulty to get the 
animal out without rubbing them off.” 
e. Shell orbicular^ depressed^ perforated^ equally con- 
vex on both sides, sharply carinated in its outer 
circumference ; aperture transverse, oval ; the 
peristome united all round, elevated from the other 
whorls, and margined; epiphragm membrana- 
ceous. (Chilotrema Leach. Rock Snail.) 
41. 8. Helix lapicida. Variegated Rock Snail. — 
Shell umbilicate, finely granulate, grey or pale 
rufous with reddish rays or spots, (t. 5. f. 51.) 
