HELICID.E. 163 



44. 26. Helix ericetorum. Heath Snail. (t. 4. 

 f. 37.) Shell depressed, semitransparent, grey 

 or brownish, and generally banded; aperture 

 roundish ; umbilicus very large and deep. 



Helix ericetorum. Mutter, Verm. ii. 226. var. a. ; 

 Montagu, p. 437. t. 24. f. 2. ; Turton, Man. ed. 

 1. 54. f. 37. ; Brard, p. 45. t. 2. f. 8. 



Zonites ericetorum. Leach, Moll. p. 101. 



Helix cespitum, b. Drap. p. 109. t. 6. f. 16, 17. ; 

 Pfeiffer, 39. t. 2. f. 24, 25. 



Helix erica. Da Costa, p. 53. t. 4. f. 8. 



albella. Penn. 



On dry heaths and downs, on the stalks of the 

 larger plants. 



Animal greenish- white ; foot slender, pellucid. 

 (Sturm, Fauna, t. 24.) 



Shell nearly an inch in diameter, much depressed 

 at top, slightly striolate, of a grey or rusty-brown 

 colour, with generally a brown band above conti- 

 nuing round the edge of the smaller volutions ; some- 

 times the bands are so obliterated as to be hardly 

 visible ; aperture nearly orbicular, not much inter- 

 rupted by the penultimate volution, longer than 

 broad, the peristome very thin and not reflected; 

 umbilicus very large, and so open and deep as to ex- 

 pose three or four of the volutions. 



This shell varies greatly in colour, being often dis- 

 tinctly banded, and at other times quite bandless, when 

 it is H. obliterata of Hartmann. The bands vary in 

 number, those on the front of the whorls being most 

 generally present. It also varies very much in size, 

 being sometimes an inch in diameter (see Pfeiffer, t. 

 2. f. 24, 25.), and at others not one third of that size 



