HELIX. 245 



smaller bands at the lower part of the whorls. It is 

 found in great numbers in chalky districts, especially 

 near the sea. That of H. caperata is flat and pale, 

 wrinkled on the upper part of the whorls, which are 

 slightly angular; it is interruptedly banded. H. eri- 

 cetorum is wider than the preceding, with a wide um- 

 bilicus, and in shape almost like a Planorhis : this 

 species is banded with brown. 



H. obvoluta has a small brown shell, with a depressed, or 

 even slightly hollow, spire ; it has a deep umbilicus, 

 and a tortuous, squarish lip. The animal is of a dusky 

 colour. Not a very common species in Great Britain. 



TI. lajyicida, fancifully named the ^'rock-cutting snaiF^ by 

 Linnseus. — Found in fissures of rocks and in woods. 

 A peculiarly-shaped brown shell : it is like a lens, or- 

 bicular, convex on both sides, and sharp at the edge. 



//. nifescens has the shell also lenticular and of a reddish 

 colour, but not so angular as H. lapiclda. 



H. Jiispida, H. revelata, and H, sericea are small species, 

 having hairy shells. The first is depressed and of a 

 horny colour; the second is greenish, rounded; and 

 the third is pale, with a squarish aperture. 



H. aaileata, H. lamellata, and E. falva are the names 



