56 



which are well defined by the suture ; underneath 

 milky-white, especially about the umbilicus, which 

 is large and very deep : aperture oblong crescent- 

 shaped, compressed, oblique, as long as it is wide. 



Wet woods and under stones. 



39. HELIX alliaria. Shell a little convex both sides, 

 with five volutions, transparent, glossy horn-colour 

 paler underneath : aperture broad crescent-shaped. 



May be easily distinguished from the last by its 

 smaller size, greater convexity, lesser number of 

 volutions, the colour underneath not being so de- 

 cidedly white, and the aperture being broader than 

 it is wide. 



When fresh taken it diffuses an odour exactly like 

 the smell of garlic, so powerful that two or three 

 of them will scent a room for some hours. 



First distinguished by Mr. Millar, of Bristol. 



Wet woods and under stones. 



40. HELIX lucida. Shell flat, transparent, glossy 

 brown horn-colour and the same underneath : 

 aperture crescent-shaped. 



Helix lucida. Drap. p. 103. t. S.f. 11, 12. 

 Brard, p. 34. t. 2.f. 3, 4. 



