50 HELIX. SNAIL-SHELL. 



come obsolete : spires five or six, the larger ones rounded, 

 but a little flattened near the line of separation, irregularly 

 wrinkled longitudinally, and crossed by very fine obsolete 

 circular lines, so as to give them a minutely reticulate ap* 

 pearance when examined by a glass ; the tip a little flat* 

 tened, and defined by a black spiral line ; the base slightly 

 but deeply perforated, whitish, with generally a band in 

 the middle composed of two or three narrow chocolate 

 zones, the interstices of which are of a reddish color : aper- 

 ture crescent-shaped, inclining to oblong, the margin thiri 

 and reflected over the perforation, with usually a raised line 

 round it on the inside near the edge, as in H. virgata. 



Sometimes it is found nearly plain, or with only a few 

 faint girdles on the body volution ; but may always be di- 

 stinguished from H. virgata, by its larger size and propor- 

 tional breadth, the flattened top and slightly flattened vo- 

 lutions, and its numerous but very narrow zones' : breadth 

 three quarters of an inch ; height half an inch. 



Dry sandy heaths near the sea. v. v. 1 



14. Helix virgata. Zoned Snail-shell. 



Lister, pi. 59. f. 56 Montagu, pi. 24. f. 1 Da Costa, 

 pi. 4. f. 7 Dorset Cat. pi. 20. f. IPennant, pi. 88. f. 3. 



Helix zonaria. Donovan, pi. 65. 



Shell convex at top, semitransparent, irregularly wrin* 

 kled across, with a deep but narrow perforation ; spires six, 

 rounded and well defined, white with a rufous tinge ; the 

 body volution with a single purplish-brown band winding 

 round the middle and continuing at the base of the rest 

 quite up to th6 top, beneath which is generally a smaller 

 white one ; at the under part are three or four veiy fine- 

 circular zones-, and often two or three broader ones *at the 

 base, sometimes interrupted with white spots, none of them 

 however close "to the perforation : aperture somewhat orbi? 

 cular, oblique, the margin reddish and reflecting overj ( the 

 perforation, within pale purplish-brown, with a white or 

 purplish thread-like raised line round the margin and a > 

 little within it : length about half an inch ; height liardly a$ 

 much. 



Variety A. Pale rufous-brown or greyish, with an ob- 

 scure 





