31 



2 1 . VITRIN A pellucida. Shell green, depressed, hy- 

 aline and glossy : aperture somewhat oval. 



Vitrina pellucida. Drap.p. 119. t. S.f. 3437. 

 Vitrina Draparnaldi. Leach, Mollusc, p. 80. 

 Vitrinus pellucidus. Montfort, ii. p. 239. 

 Helix elliptica. Brown, Wern. S. ii. t. 24,. f. 8. 



Shell half an inch long, not so much in height, ex- 

 tremely thin and transparent, of a pale watery 

 green and quite smooth : volutions three, the first 

 very large and a little oblique, the others but little 

 raised and ending obtusely : aperture very large, 

 oval-elliptic, rather oblique, interrupted at top by 

 the prominency of the second volution, with the 

 margin thin and membranaceous, often coloured 

 with a pale brown border, without internal rib : the 

 suture well marked, and when magnified exhibiting 

 a striated spiral line ; pillar lip a little reflected, and 

 forming a slight concavity, but not an umbilicus. 



In woods, among decayed leaves, and under stones. 



22. VITRINA elongata. Shell whitish, nearly globu- 

 lar, hyaline : aperture oval-oblong ; volutions two. 



Vitrina elongata. Drap. t. S.f. 41. 



Shell about half the size of the last, white and trans- 

 parent, with hardly two volutions, the outer one 

 extremely large in proportion. 



Found sometimes with the last. 



