468 Records of the Indian Museum. [Vol. XXIV, 



The distal part narrows very suddenly and considerably and the 

 apex is only as long as one quarter of the basal width. The 

 apex is very shallowly notched and bears a pair of small spines on 

 each side of the notch. There are no plumose setae. The lateral 

 margins bear two spines at the widest part of the telson but 

 otherwise are naked. 



(5) The uropods in the specimen figured have the endopod and 

 exopod of approximately equal length, but there appears to be some 

 variation in this respect since one of the female specimens has the 

 endopod distinctly shorter than the exopod. There is a single 

 spine on the lower inner margin of the endopod in the region of 

 the otocyst. In M. gibbosa there are five such spines. 



(6) The pleopods of the male agree essentially with those of 

 M. gibbosa, except that there is a small branchial plate at the base 

 of the endopod. This lamella-like expansion is broad and flat on the 

 second to the fifth pleopods, but is narrower and more finger-like 

 on the first pleopod. The exopod of the fourth pleopod terminates 

 in a single stout plumose spine. 



(7) M. indica is smaller than M. gibbosa, adult specimens of 

 both sexes measuring only 4 mm., as against 6-7 mm. in the latter 

 species. 



Mysidopsis kempi, sp. nov. 



Text figs, i^a-g. 



Locality. — Kilakarai, Gulf of Manaar, among weeds, 1-2 fa- 

 thoms, February, 1913. Eleven females and four males, 5-6 mm. 

 (Types.) 



Description : — Carapace leaving the last two thoracic somites 

 exposed dorsally, but laterally covering all but the last somite ; 

 produced in front into a short triangular plate with a bluntly point- 

 ed apex which does not project forward very much beyond the 

 antero-lateral corners ; no tubercles or nodules. 



Eyes large, pigment black, cornea as wide as the rest of the 

 eye and occupying half the eye in dorsal view. 



Antennal scale narrowly oval in shape, four times as long as 

 broad; setose all round, terminal joint distinct, extending for one- 

 third of its length beyond the antennular peduncle. 



Mouth parts and thoracic appendages not differing greatly 

 from those of M. didelphys ; the inner lobe of the first maxilla 

 has three terminal setae ; in the posterior thoracic limbs the merus 

 is about equal in length to the ischium but less expanded, the tar- 

 sus is three-jointed, the second joint the smallest ; the basal joint 

 of the exopodite has the outer corner rounded and the flagellum 

 is composed of eight to ten joints. 



Telson (without terminal spines) as long as the last abdominal 

 somite, one and a quarter times as long as broad at its base, apex 

 quadrate with rounded angles, with four pairs of long stout spines, 

 the inner pair nearly one-third the length of the telson, outermost 

 pair of the four about half as long as the inside pair, lateral mar- 



