74 Contributions to Indian Malacology. [No. 2, 



lines above and below ; epidermis thin, horny. Apex minutely 

 granulate or sub-granulate, almost imperceptibly raised above the flat 

 spire ; suture not impressed, very narrowly marginate. Whorls 6, 

 narrow and closely wound, flat above ; the last angulate above the 

 periphery, rounded beneath, descending close to the mouth, very 

 slightly compressed behind the same. Umbilicus very shallow, 

 exposing ail the whorls. Aperture, diagonal, truncately subcircular ; 

 peristome white, reflexed throughout, margins joined by a raised bar, 

 from the centre of which a lamina passes up the parietal side of the 

 whorl to the plication, which lies at about \ the circumference of the 

 whorl from the mouth, and resembles that of Helix achatina, Gray ; 

 the parietal transverse lamina being simple and oblique above, then 

 bifurcating, giving off the lamina which runs to the mouth, and two 

 short basal supports. A thread-like lamina also runs along the 

 extreme base of the parietal side of the whorl, and joins the aperture. 

 Palatal teeth 5 ; the upper 3 and the lowest longitudinal, the upper- 

 most very long and thin, the 4th vertical, corresponding to the fork 

 in the parietal lamina. 



Millem. inch. 



Major diameter, 13 0.52 



Minor ditto, 11 0.44 



Axis, 4 0.16 



Habitat — Banks of Tsanda Khyoung, near Kaintha village, in 

 Henzada district, Pegu. Larger variety ; major diameter 18 millem. 

 minor diameter 15, height 5. A very few specimens were found on 

 tin: banks of the Nungatho Khyoung, Henzacla district. 



This shell combines the external form of H. leiophis, Bens., and 

 H. refufja, Gould, with the internal plication of H. achatina, Gray. 

 From both the first named species, however, the present may be easily 

 distinguished by its more perfectly discoid shape, by its smaller 

 height, and more open umbilicus, as well as by its colouring. Exter- 

 nally, it is a very different shell from H. achatina, being of not more 

 than half the thickness of that species. The internal plication, 

 however, is absolutely undistinguishable. 



Like many other shells in Pegu, this species has evidently a very 

 local distribution. In the spot where it was found first, among some 

 limestone rocks forming a low ridge skirting the right bank of the 



