39« 



Memoirs of the Indian Museum. 



[Vol. V, 



mate; the latter, however, is much produced inferiorly at its distal end and the two 

 segments when seen from below are almost equal in length. The basal segment bears 

 one or two setae internally and the distal some n or 12 distributed round its apex. 

 Of the two segments that compose the endopod, the first is a little shorter than the 

 second and is provided internally with a series of six or seven spines which are closely 

 set and increase in size distally. There is also a single slender spine at the end of 

 the outer margin. The ultimate segment bears five or six slender spines at its apex 

 and one or two on the inner edge. 



Large specimens reach a length of about 5 mm. 



Stebbing in his monograph of the Cumacea l recognises eight species of Iphinöe. 

 Of these the species from Lake Chilka is evidently most nearly allied to /. trispinosa 

 (Goodsir), a species found in the N. E. Atlantic from an area ranging from the Bay of 

 Biscay to the Shetland Is. and Norway. So far as females are concerned /. sanguinea 

 is easily distinguished from this species by the number and disposition of the teeth 

 in the mid-dorsal line of the carapace, by the teeth on the lower margin of the cara- 

 pace, by the form of the second pedigerous somite which does not overlap the first, 

 by the bristles on the last three of these somites and by a great number of details in 

 the appendages. 



Iphinöe sanguinea is, when living, of a deep blood-red colour, a feature to which 

 allusion is made in the specific name. The species was only found twice in the 

 Chilka Lake, firstly in March, when a few specimens were obtained in the vicinity of 

 Kalidai in water of specific gravity roo8 (corrected), and secondly in September, 

 much further to the north, in water that was practically fresh. On the latter occa- 

 sion large numbers of specimens were collected, all of them, however, females. 



The absence of males is doubtless to be attributed to differences in habits 

 between the two sexes. The examples obtained were all caught in nets fished on 

 soft mud at depths of between 6 and 8 ft. The males are perhaps to be found at 

 some distance above the bottom, but I have searched our town et gatherings for them 

 without success. There can be little doubt that the species is a permanent inhabi- 

 tant of the main area of the lake : there are embryos in the brood-pouches of some 

 of the females caught in September. 



The species of Iphinöe hitherto described are recorded from the Mediterranean 

 and N. E. Atlantic, from the Gulf of Guinea and from S. Africa. One species is also 

 known from the Gulf of Manaar. 



Family DIASTYLIDAE. 



Genus PARADIASTYLIS, Caiman. 



Paradiastylis culicoides, sp. nov. 



This species is remarkable for the great differences that exist between the sexes 



in the form of the apex of the telson. In the female there are two minute terminal 



1 Das Tierreich: Cumacea, p. 42 (1913). 



