100 Records of ihe Indian Musevni. [Vol. XIY, 



behind the orlMt. The k)\ver l)order bears from to 5 teetli (usually 

 1 to 3).^ 



The antero-lateral angle of the carapace is produced and forms a 

 small tooth. This character is apparently not found in typical C. 

 iveheri, nor (according; to specimens from Deli in Sumatra, preserved 

 in the Indian Museum) in typical var. siimatrensis. The character 

 is an unusual one in Caridina and in some species (6*. denticulata, de Haan, 

 for iustance) appears to be of considerable specific importance. In the 

 specimens from the Shan States the tooth is invariably present, but in 

 samples of very closely related forms from other parts of India it is 

 inconstant in its development.^ For the present, at least, I am not 

 able to regard the character as having specific value in the C. weheri 

 group. 



The second segment of the antennular peduncle is short and stout, 

 intermediate in form between de Man's figs. 23 and 23/ {loc. cit.). The 

 antennal scale is about two and three-quarter times as long as broad. 



The carpus of the first pair of peraeopods is deeply excavate and 

 from 1-6 to 1-75 times as long as broad ; that of the second pair is from 

 4-5 to 5-5 times as long as broad. The fingers in the second pair are 

 scarcely one and a half times as long as the palm. The propodus of 

 the third peraeopods is from 3-2 to 3-8 times as long as the dactylus 

 (rarely shorter : 2-8 times), the latter segment bearing 6 or 7 teeth. 

 In the fifth peraeopods the propodus is from 2-9 to 3-2 times the length 

 of the dactylus, the dactylus bearing from 27 to 33 spinules. 



There are from 13 to 18 movable spines on the outer uropod. 



Exceptionally large specimens reach a length of 19 mm. ; the majority 

 of those in the collection are smaller, not exceeding 15 mm. The eggs 

 are very large, about 1-1 mm. by 0-7 mm. in longer and shorter diameter. 

 Ovigerous females carry very few eggs, the numbers in two instances 

 in which they were removed and counted being 19 and 26. 



This form differs from C. weheri var. sumatrensis in a number of par- 

 ticulars which are apparently of subspecific importance : {i) both dorsal 

 and ventral teeth of the rostrum are rather less numerous, (ii) the 

 antero-inferior angle of the carapace is toothed, (m) the fingers of the 

 second peraeopod are proportionately shorter in relation to the palm 

 and the propodus of the third peraeopod shorter in relation to the dac- 

 tylus and {iv) the eggs are very much larger. 



Dr. Annandale found a number of specimens in small streams running 

 into the Inle Lake at an altitude of 3000 ft., and in those on the He-Ho 

 plain at 3800 ft. It was occasionally found in the lake itself, near the 

 edge, but never in the central region. 



The colouration of living specimens is described by Dr. Annandale 

 as follows : — " In individuals from amonc; areen weeds in a small stream 



^ Of one hundred specimens two have no ventral teeth, twenty-four have 1 tooth, 

 forty-three have 2 teeth, twenty-three have 3, six have 4 and two liave 5. 



^ Thus in a hundred specimens of a form closely allied to that obtained by Dr. Annan- 

 dale, found at 'J'innevelly in South India, the antero-lateral angle bears an acute tooth 

 in 18 per cent, of the specimens, is rectangular or obtusely angled in 19 per cent, and is 

 rounded in 63 jier cent. This form is intermediate between typical var. i^iimalreiims 

 and the .Shan race in the size of the eggs, which are 0-7 mm. in length and 0-45 mm. in 

 breadth. 



