30 R. GlTRNKN' : India)i Frrshwal cr F.iiio]]iosl raca. [Vol.. I, 



female but little expanded, and slightly asymmetrical in both 

 sexes. In the female the left side is produced rather more than 

 the right, the reverse being the case in the male. In the male each 

 wing of this segment ends in a sharp point. The abdomen of the 

 female consists of three segments, the first being longer than the 

 last two and the furca combined. It is of nearh' equal width 

 throughout and bears on either side, a short delicate spine. In 

 the male the abdomen consists of five segments. The first bears 

 a rather long, slender spine on the right side, while the fourth 

 is slightly as^mimetrical, being produced somewhat backwards to 

 overlap the succeeding segment on the right, in this respect 

 resembling D. doriai, Richard. The f ureal rami are not divergent 

 and are ciliated in the female on both sides. 



The antennae extend, when refiexed^ somewhat beyond the 

 furcal setae. In the male the prehensile antenna is not much 

 expanded (fig. 14). The antepenultimate joint has a narrow hyaline 

 lamella and a series of teeth (fig. 15). Of these teeth one is large 

 and directed forward and outward beyond the end of the joint. 

 Behind this tooth there are three or four smaller ones springing 

 from the edge of the joint. In one specimen the two posterior 

 teeth appeared to form part of the hyaline lamella, and not to 

 spring from the joint itself. 



In the fifth foot of the female (fig. 16) the basal joint has a 

 large spine on its external face ; the endopodite is little more than 

 half as long as the first joint of the exopodite, and its end is fringed 

 with hairs. The third joint of the exopodite is quite distinct and 

 bears two setae. 



The right leg of the fifth pair in the male (fig. 17) has a small 

 hyaline lamella on the second basal joint, and the endopodite is 

 barely as long as the first joint of the exopodite. The second joint 

 of the latter is narrow and curved, bearing a large lateral spine 

 very near its base. The left leg has two small hyaline lamellae 

 on the second basal joint ; the endopodite is relatively long, about 

 two- thirds as long as the exopodite. 



Length of female, i'q — 1"95 mm. 

 ,, ,, male, i'75 mm. 



Occurrence. — Swamp at Chakradharpur (No. 14). 



25. Diaptomus doriai, Richard. 



Fairly common at Chakradharpur (Nos. 14, 16). 

 A species so far only known from the Oriental Region, but 

 widely distributed within that Region. 



26. Diaptomus similis, Baird. 



A few specimens found at Chakradharpur (No. 17). 

 Distribution. — Palestine and Turkestan. 



27. Diaptomus strigilipes, n. sp. 



Body stout and cylindrical, the last two segments of the thorax 

 completely fused (fig. 18). In the female the last segment of the 



