1865.] Land and Freshwater Shells from the Shan States, 275 
paulum remota. Callo flavescente, ore interiori ccerulescente. Anfrac- 
tibus 64. 1.45 « 1.10 ! 
Var. carinata, Cavinis quatuor fortissimis supra munitur, et infra 
peripheriam sex vel quinque levioribus; colore albido; epidermide 
flavescente ; fasciis nonnullis castaneis interdum ornata. 1.40 % 1.00. 
These two varieties pass into each other, but the peculiar columellar 
callus is pretty constant inall specimens. But for this character, some 
of the smooth variety might be referred to P. Bengalensis, which 
is an extremely variable species. 
The strongly corded var. is well marked, but I have preferred taking 
the smooth shell as the type of the species, and have regarded the 
keeled individuals as hypertrophied, placing the greatest value, as a 
specific character, on the columellar callus, occurring in both varieties. 
2. P. melanostoma. Paludina...... 2. 
1. Bithinia nassa, n. s. 
Testi elongata, turbinaté, polita, diaphana, solidiusculé.  Labio 
expansiusculo, plicdé callos’ externd munita. Anfractibus quinque, 
0.45 & 0.25. 
This is the only species of Bithinia in the collection, and it is well 
characterised by the strong rib-like fold strengthening the lip outside, 
somewhat as in “ nassa.”’ 
1. Ampullaria, sp. 
A small species similar to that found at Maulmein, but distinct 
from the smaller species met with in the Arakan hills. 
An ordinary specimen measures, 1.75. Aperture 1.25. A very large 
specimen of the Arakan species. 1.45. Aperture 0.95. 
Fam. Hettciws. 
Of Helices of all sections, the collection comprises twenty-three 
species, nearly one half of which seem undescribed. 
1 Hehe, n. s. 
A large dextral species of six whorls partaking the characters of H, 
interrupta and H. semidecussata, but very distinct from either. All 
the specimens are unfortunately dead shells. Lat. 1.55 % Alt. 0.75. 
2. H. Blanfordi, Th. 
This species was originally founded on a single shell from Darjiling 
in my cabinet, which, from its sculpture, I had no hesitation in separat- 
36 
