31 



21. ViTRiNA pellucida. Shell green, depressed, hy- 

 aline and glossy : aperture somewhat oval. 



Vitrina pellucida. Drap. p. U9.t. 8./. 34—37, 

 Vitrina Draparnaldi. Leach, Mollusc, p. 80. 

 Vitrinus pellucidus. Montfort, ii. p. 239. 

 Helix elliptica. Brorvn, Wern. S. ii. t. 24./. S. 



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. 8./. 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. 



