55 



hardly visible. Aperture nearly orbicular, not 

 much interrupted by the penultimate volution, 

 longer than broad, the peritreme very thin and not 

 reflected ; umbilicus very large, and so open and 

 deep as to expose three or four of the volutions. 

 Draparnaud has, by some oversight, both in the re- 

 ference to his figures and in his description, com- 

 bined together his H. Cespitum and H. Erice- 

 torum : hence in the specific character he has re- 

 presented the peritreme as margined. 



On dry heaths and downs. 



38. HELIX nitens. Shell flat, transparent, glossy, 

 with six volutions, greenish horn-colour, white 

 underneath : aperture narrow crescent-shaped. 



Helix nitidula. Drap. p. 117. tab. S.f. 21, 22. 

 Helix nitens. Linn. Trans, viii. p. 198. t. 5.f. 7. 

 Helix lucida. Mont. p. 425. t. 23. f. 4. 

 Helix nitida. Drap. p. 117. t. S.f. 23 to 25. 



Brard.p. 31. t. 2. f. 2. 



Zonites lucidus. Leach, Mollusc, p. 104. 



Shell sometimes growing to nearly three quarters of 

 an inch in diameter, but is usually not half the size, 

 glossy and irregularly striate, with six volutions 



