74 Contributious 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 all 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 
bifureating, 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, 
Moajondiameteny:. 44. ibtacs os 13 0.52 
Minoridathoyre stu esetedast if 0.44 
IASI 6s he. SPORT? ADE och, aba : 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 
the banks of the Nungatho Khyoung, Henzada district. 
This shell combines the external form of H. lecophis, Bens., and 
H. refuga, 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 

