HELIX. Ill 



Some shells change the character of their marking 

 during the life of the snail ; thus some that have all 

 the bands separate in the young state, have one or 

 more bands united together in the older or more 

 recently formed part of the shell, and vice versa. 



Sometimes, instead of the bands being darker than 

 the ground colour of the shell, they are paler and 

 more transparent. 



The ground colour of the shell also varies from 

 very pale whitish to opaque white, yellow and yel- 

 lowish red to dark red or brown. 



M. Moquin Tandon divides the three specimens 

 into varieties according to the bands and colours, 

 naming them after conchologists, and in this manner 

 indicates no less than 77 named kinds of H. nemoralis 

 and 46 of H. hortensis ! 



b. Shell subglohose, solid, handed; peristome rather 

 thickened, reflexed ; axis perforated ; epiphragm 

 calcareous, ivith several membranaceous ones 

 within it. (Pomatia Gesner.) 



38. 5. Helix Pomatia. Edible Snail. — Shell 

 nearly globular, solid, striate, pale rufous, with 

 obscure darker bands ; aperture roundish lunate ; 

 peristome thickened, slightly reflexed. (t. 4. 

 f. 34.) 



Helix Pomatia. Linn. S. N. i. ; Montagu, p. 405. ; Drap. p. 

 87. t 5. fig. 20—22.; Brard, p. 19. tab. 1. fi^. 5.; Forhes 

 and Hanley, B. M. iv. 46. t. 116. f. 2. — Cochlea Pomatia, 

 Da Costa, p. 67. t. 4. f. 14. — Cochlea edulis. Humph. M. 

 C. — Pomatia antiquorum. Leach, Moll. Sijn. 64. — Coena- 

 toria pomatia. Held, his, 1837, 910. — Helicogena pomatia. 

 Hartm. i. 98. t. 29, 30. 35. 



