1919. | N. ANNANDALE & B. PrasHapD: Mollusca. 43 
and oval; its main axis lies nearly parallel’ to but considerably 
outside that of the shell; it is hardly pointed posteriorly. The 
outer lip is sharp, broadly and fairly regularly arched; it extends 
far beyond the body-whorl posteriorly. The antero-internal angle 
is broadly rounded aud a little expanded, the anterior border 
slightly flattened in its immediate vicinity. The columella is 
straight, its callus well-developed and broad but not coarse; it is 
slightly or not at all folded and is extended over the narrowly 
timate umbilicus. The sculpture consists of fine, somewhat ir- 
regular longitudinal ridges with microscopic striae running parallel 
to them ; the former are often developed only on the body-whorl. 
Form from the Baluchistan desert. Our specimens from the 
Baluchistan desert were collected in December, 1918 by Mr. S. W. 
Kemp at the edge of the Zanginawar lakes, 20 miles east of 
Nushki. These lakes are a series of small basins which retain the 
overflow from the Pishin river and contain water that is nearly 
fresh in winter and supports a luxuriant submerged vegetation. 
Mr. Kemp found only empty shells. These were abundant on the 
shore of the lakes one to two feet above the water-level. 
The shells from Zanginawar only differ from those from the 
Kerman district in being rather smoother and distinctly narrower 
and in having the columellar callus narrower and slightly more 
folded. As may be seen from the figures on plate V, they vary 
somewhat in outline, and young shells are narrower and have the 
mouth less expanded than old ones. 
Unfortunately we have no information about the radula or 
soft parts of either race of this species. 
Measurements of Shells (in millimetres). 
Specimens A-—C are from Saidabad, S.W. of Kerman, S. Persia: specimens 
D—F from Zanginawar in the Baluchistan desert, 20 miles west of Nushki. 
Ac Maree tak © eet Der bie EG 
Length ff ay L323 EI Oe LOO ESO aett Ea29 
Breadth am 5, LOTOr Oren a7 a. a0 
Length of aperture ia ELE 728 98-Oe 407596 Gi2 = Orn 
Breadth of aperture £3 70" 75) OF 95,0) Or Aa Op eenoes 
eaeth of spire (dorsal) '".. 9.295, 2:7) 202i ey 
Breadth or pase Of Spite 2. “2°50 °2°5.° 2:5" 2:01 2-4 2-6 
It seems better, in the lack of anatomical information, not to 
dogmatize as to the precise relations of this form. There can, how- 
ever, be little doubt that it belongs to the same group as L. auricu- 
larva. 
Limnaea iranica, sp. nov. 
(Bis vit ice si) 
1878. Limnaea lagotis var. persica, Nevill (nec Issel), Hand List Moll. 
Ind. Mus.. 1, p. 237. 
Shell. ‘he shell is of small or moderate size, fairly thin, dull 
on the external surface, of a pale, dull opaque buff colour, orna- 
