Vol. IX, No. 6.] Crustacea Decapoda of the L. of Tiberias. 253 
[N.S.] 
Race gedrosianum, 
Seistan, Baluchistan, Peshawar and the Punjab Salt 
Range. 
Race (?) monticola, 
Eastern Himalayas and (?) the Khasi Hills, Assam. 
Potamon potamios is extremely common round the edge of 
the Lake of Tiberias and the neighbouring springs, inhabiting 
burrows just above the water-line and thence wandering both 
into the water and on to dry land in search of food. A 
as the first rains of the winter season fall (in 1912 this was on 
October 16th), its landward expeditions are greatly extended. 
ear Tiberias, after rain had fallen, it was noticed in consi- 
passing animals. The food is evidently of a very varied nature. 
Large individuals were observed eating dead fish in the lake; 
others were attracted to (and captured by) a piece of tomato 
attached to a string; a chicken-bone thrown into the spring at 
Ain-et-Tineh was seized and carried away bodily by a crab 
that appeared to issue from under a rock before the bone had 
touched the water ; half-grown individuals were watched runni 
after, seizing in their claws and devouring, large black ants! in 
the highway. ee 
At least three years must elapse before the full size is 
a 
mm. across the carapace, while the great majority of speci- 
mens measure from 30 to 40 mm. Large individuals are com- 
paratively scarce; the largest in the collection of the Indian 
seum measures 61 mm. in breadth, but some that were seen 
in the lake were probably larger. The breeding season 1s 
almost uniform olive green, only the tips of the claws and feet 
1 The large workers of Camponotus maculatus thoracicus, Fabr., v: 
fellah, Bisery: We have to ate Prof. W. M, Wheeler for identifying 
Speci : 
