18 Records of the Indian Museum. [Vor. XVIII, 
M. tugrina (Hutton). N. Baluchistan. 
M. scabra var. elegans (Hutton). N. Baluchistan. 
Melanopsis deserticola, sp. nov. Persian Baluchistan. 
PULMONATA. 
Fam. Limnaeidae. 
Limnaea persica, Issel. Baluchistan desert; S. Per- 
sla. 
Limnaea tvanica, sp. nov. Persian Baluchistan. 
Limnaea bactriana, Hutton. N. Baluchistan ; Seistan. 
Limnaea gedrosiana, sp. nov. Do. do. 
L. gedrosiana var. rectilabrum, nov. Do. do. 
Limnaea truncatula, Gray. ~ _N,. Baluchistan. 
Limnaea hordeum, Mousson. Seistan. 
Fam. Planorbidae. 
Gyraulus convextusculus (Hutton). N. Baluchistan; Seistan. 
Gyvaulus euphraticus, Mousson. Do. do. 
Segmentina calathus (Benson). Seistan. 
Lamellibranchia. 
Fam. Unionidae. 
Lamellidens marginaits, subsp. Seistan ; Afghan desert. 
vyhadinaeus, subsp. nov. 
Fam. Cyrenidae, 
Corbicula fluminalis (Miller). Baluchistan ; Seistan. 
2 Pisidium paludosum, Hutton. N. Baluchistan. 
GEOGRAPHICAL DISTRIBUTION. 
The molluscs to be considered in this paper come mainly 
from three districts, (1) the hill-country of Baluchistan watered 
(so far as it is watered at all) by the Lora or Pishin river, which 
has more or less saline water and makes its way down to the 
desert, where it disappears in the Zanginawar lakes ; (2) Seistan, 
the delta and basin of the Helmand river, which rises in the Hindu 
Kush a considerable distance to the north of Baluchistan and 
passes a great body of fresh water, and (3) Persian Baluchistan, a 
mountainous district lying some considerable distance south ot 
Seistan and reaching to the Arabian Sea. These three districts 
are separated by the great Afghan-Baluch desert, through which 
the Helmand flows. As even the desert is not devoid of aquatic 
molluses, we have actually four districts to consider. 
MOLLUSCA OF THE HILI-COUNTRY OF BALUCHISTAN. The 
molluscs of this district were described seventy years ago by 
Hutton, and we have no species to add to his list, though we do 
not accept all his identifications. The forms known from this 
district are: 
Melanoides pyramis. Melanoides scabra var. elegans. 
Melanoides tigrina. ? Amnicola parvula. 
