igoj.~\ Records of the Indian Museum. 31 



thorax is expanded into rather large wings ^ each with two very 

 small, blunt teeth. In the male this segment bears a slender 

 sensory spine on either side. The abdomen of the female consists 

 of three segments, of which the first, or genital, segment is longer 

 than the rest of the abdomen. It is somewhat asymmetrical, bear- 

 ing a short sensor}' spine on the left, but being produced on the 

 right (fig. 18a) into a finger-shaped process bearing a minute sen- 

 sory tooth at the apex and one on the dorsal face. 



The antennae are ver^^ much longer than the whole body. The 

 prehensile antenna of the male is not much expanded ; the ante- 

 penultimate joint has no hyaline lamella and is produced into a 

 long, slighth^ curved process. 



In the fifth leg of the female (fig. 19) the basal joint bears a 

 very large tooth on its external face : the endopodite is nearly the 

 same length as the first joint of the exopodite, pointed and ciliated 

 at its extremity. The second joint of the exopodite, or claw, has 

 a conspicuous jagged edge, with a variable number of teeth, and 

 may have, in addition, two little teeth on its external face. The 

 third joint is distinct and bears two slender spines. 



In the male the second basal joint of the fifth pair of legs bears 

 a small hyaline lamella (fig. 20). The endopodite of the right 

 leg is very much longer than the first joint of the exopodite and is 

 constricted at the end. The second joint of the exopodite is curved 

 and tapering, with a very large lateral spine. The terminal joint 

 is long and sickle-shaped. In the left leg the endopodite is long 

 and slender and the exopodite terminates in a rounded knob bear- 

 ing an inner short process. 



lyength of female^ i'3 — 1'4 mm. 

 ,, male, 1-25— 1-3 mm. 



Found at Chakradharpur (No. 14). 



28. Cyclops oithonoides , Sars. 



A few specimens taken at Chakradharpur (No. 14). 



Distrihution. — ^Europe, Asia Minor, Central Asia, Malay 

 Archipelago, New Guinea, Egypt, North America, 



29. Cyclops leuckarti, Claus. 



By far the commonest C3'^clops in these districts. 

 Collections Nos. 6, 7, 8, 9, 11, 12, 13, 14, 17. 



30. Cyclops serrulakis , Fischer. 



This species appears in several collections (Nos. 11, 13, 14. 15, 

 16) but does not seem to be abundant. It is a species of world- 

 wide distribution. 



31. Cyclops fimbriatus, Fischer 



Only found in the Museum tank (No, 10), It seems to occur 

 in every part of the world. 



