42 Records of the Indian Museum. [Vor XV, 
environment either Philippi’s or Blanford’s specimens came. It is 
possible, therefore, either that Issel’s type was immature, or that 
the specimens from the desert are more near the typical form than 
those which chanced to be collected in the same district as it. We 
will describe and figure shells from the Kerman district and point 
out the characters wherein those from the desert (examples of which 
we also figure) differ from them. 
NMOBOOE iN EAN 
CMA OSA 
Fic. 6.—Radular teeth of Limnaea (x ca. 185). 
A. Teeth of Limnaea gedrosiana, sp. nov from pond in garden in Quetta. 
B. Teeth of same species from the reed-beds of the Hamun-i-Helmand. 
C. Teeth of L. gedrosiana var. rectilabrum, var. nov from siones at edge of 
Kushdil Khan reservoir, Northern Baluchistan. 
D. Teeth of same variety from small pool in desert near Nasratabad, 
Seistan. 
E. Teeth of Z. bactriana, Hutton, from irrigation channel, Nasratabad, 
Seistan. 
EK. ‘Teeth of Z. tyanica from Persian Baluchistan, 
Form from the Kerman district. The shell is small and thin, 
of a pale horny colour and (perhaps through age) opaque. The 
spire is short but prominent, acutely pointed and-slightly oblique 
as a whole. It is considerably longer on the dorsal than on the 
ventral aspect of the shell, occupying about 4 of the total length 
on the former and on the latter nearly 4. The body-whorl is 
relatively large but not greatly inflated; its outlines are sinuous 
and it has considerable obliquity. ‘The mouth of the shell is large 
