very acute periphery ; brown, with a "white lip ; surface smooth, or 

 almost microscopically granulated and punctulated, with a smooth 

 shining epidermis ; spire moderately and somewhat convexly eleva- 

 ted ; whorls fine, scarcely convex, with a suture not impressed ; 

 aperture subtriangular, with a very thick, strong lip, which has along 

 the lower side within three teeth, of which the outer is larger, and is 

 double at the extremity when mature, or nearly to the base when first 

 formed; the inner tooth is small and very near the columella; the 

 two outer teeth have exterior pits proportionate to their size ; umbili- 

 cus small, entirely concealed in the old shells. 



Greatest breadth 1.4 inch ; least breadth 1.2 inch ; height 55 inch. 

 Helix Chittyana. Shell convex above, more convex beneath 

 and more widely so than the preceding, next to the acute periphery a 

 little concave above and very convex below ; brownish white, with a 

 zone of deep brown on both sides of the whitish periphery, with a 

 brown lip ; surface slightly striated, shining, with a smooth shining 

 brown epidermis, which is deciduous in narrow irregularly zigzag 

 portions ; spire convex, moderately elevated ; whorls four and one- 

 half, nearly flat, with a suture not impressed ; aperture subtriangular 

 but much' modified by the convexity of the last whorl, with four teeth, 

 of which the outer two stand over one exterior pit, and of which the 

 inner one is small, very near the columella, and without any exterior 

 pit. 



Greatest breadth 1 inch ; least breadth .95 inch ; height 5 inch. 

 Helix picturata. Species like H. siniiata, Miill., but the shell 

 is usually smaller, the whorls are always much shorter, the spire more 

 depressed, and the shell less convex beneath : it is remarkable for 

 having portions of the epidermis hydrophanous, which are mostly in 

 zigzag or radiating pale brown stripes : the aperture is much more 

 expanded laterally than H. sinuata : umbilicus small, partly covered 

 by the reflected lip. 



Greatest breadth .9 inch ; least breadth .73 inch ; height .38 inch. 

 Variety a, without umbilicus and the spire rather more elevated. 

 Helix strangulata. Shell depressed-globular, moderately, reg- 

 ularly, and nearly equally convex above and below ; reddish brown, 

 paler beneath ; with very fine granulated wannkles ; spire moderately 

 convex, with a rather deep .suture, last whorl very high; aperture 

 small, subovate, very much constricted by two long narrow and deep 

 exterior pits, which nearly meet under the lips, and w^hich within pro- 

 ject as two teeth connected at base, as in H. Bronnii, Pfr., but are 



