166 Rev. R. SHEPPARD’s Account 
59. HELIX oBscuRa. Trans. Linn. Soc. vol. viii. p. 212. 
On dry banks near Ipswich and at Spexhall ; and on trunks 
of trees in Friston wood and Middlewood Offton. 
In Essex, it inhabits my garden and adjoining fences ; West 
grove, Little Stour wood, and Cliff, all in Wrabness. 
These shells, particularly in their young state, show great sa- 
gacity and ingenuity by covering themselves with an epidermis 
adapted to the different situations in which they are found ; and 
when so covered, it is almost impossible for any other than. a 
conchological eye to detect them. If its abode be upon the 
trunk of a tree covered with Lichens, then is the epidermis so 
constructed as to cause the shell to resemble a little knot on the 
bark covered with such substances. If on a smooth tree, from 
whose bark issue small sessile buds, as is frequently the case, it 
will pass off very well for one of them; and on a dry bank, or the 
lower part of the body of a tree splashed with mud, its appear- 
ance will be that of a little misshapen, pointed piece of dirt. 
60. HELIX LUBRICA. Trans. Linn. Soc. vol. viii. p. 213. 
In moss, and under stones, pieces of wood and bark in moist 
woods and shady places. 
Draparnaud refers this species to Helix subcylindrica of Lin- 
næus : if he be right, then must Linnæus have been greatly de- 
ceived, who says, ** habitat in aquis dulcibus." But in my opinion 
he is in an error as to the Synonym, for the H. subcylindrica of 
Linnæus has only four anfractus, whereas the H.lubrica has six. 
With respect to the H. subcylindrica of Dr. Pulteney, the 
learned authors of the Descriptive Catalogue of the British Tes- 
tacea assure us* that it is the Turbo truncatus, a sea shell. 
* Trans. Linn. Soc. viii. p. 177. 
61. Hzr- 
