CUMACEA. 

 By Stanley Kemp. 



The Cumacea found in the Chilka Lake belong to two species both of which 

 appear to be undescribed. They belong respectively to the genus Iphinöe of the 

 family Bodotriidae and to Paradiastylis of the family Diastylidae. No species of 

 either of these genera has hitherto been recorded from brackish water and the group 

 as a whole is essentially marine in habitat. 



The Iphinöe was found only in the main area of the lake. It occurred rarely in 

 March in water of specific gravity i - oo8, but was taken in abundance later in the 

 year in water that was almost or quite fresh. Only females of this species were 

 discovered. 



The Paradiastylis was common in the main area of the lake at all times of the 

 year and, in the freshwater season, was found in the outer channel. The species is 

 evidently able to thrive in water varying in specific gravity from iooo to i - oi5. 



Family BODOTRIIDAE. 



Genus IPHINÖE, Bate. 



Iphinöe sanguinea, sp. nov. 



Of this species females only were obtained. 



The carapace, including the pseudorostral lobes, is about two-sevenths the 

 total length, excluding uropods. The depth of the carapace is a little more than 

 half its length. The pseudorostral lobes are scarcely upturned; they are apically 

 pointed and the margin of each, below the apex, is obliquely truncate —slightly con- 

 cave anteriorly and a little convex in advance of the exceedingly shallow antennal 

 notch. The convexity bears a series of about rive small forwardly-directed teeth 

 and further back, behind the insertion of the antennae, there is a series of some 

 twenty similar teeth on the anterior half of the lower margin of the carapace (text- 

 fig. 2 a). There is no antennal tooth. The carapace is feebly carinate in the median 

 line for a short distance behind the eye, the carina bearing five (more rarely four) 

 small forwardly-directed teeth. The teeth are situated well in advance of the middle 

 point of the carapace, differing conspicuously in position from those found in the 

 Atlantic /. trispinosa. The carapace is otherwise devoid of sculpture, but is closely 

 covered with a very fine reticulation, only visible under high powers of the 

 microscope. 



The first pedigerous somite is well exposed both dorsally and laterally and is not, 

 as in /. trispinosa, covered at the sides by a forward prolongation of the second 

 somite. The second somite, measured dorsally, is about one and a half times the length 





