142 



Records of the Indian Museum. 



[Vol. XIX, 



the merus. There are large spines on the inferior margins of the 

 ischium, meriis and propodus, usually two on the ischium and 

 two, three or four on the merus and propodus. The propodus is 

 about twice the length of the carpus and three and a quarter 

 to nearly four times the length of the dactylus, which is simple 

 and sharp-pointed. 



There are no epipods on the legs. The series of gills consists 

 of five pleurobranchs, one situated above each peraeopod. 



The abdominal somites are smooth and dorsally rounded ; 

 measured dorsally, the sixth is about one quarter longer than the 

 fifth. In the male the endopod of the first pair of pleopods is 

 oblong in shape with four long setae at its distal end. The 



Text-fig. 3. — Discias exnl, sp. nov. 



a. First peraeopod. e. Third peraeopod. 



b. Chela of first peraeopod, from below, f. Fifth peraeopod. 



c. Second peraeopod. g. Telson. 



d. Fingers of second peraeopod. h. Uropods. 



remaining pairs of pleopods are provided with an appendix interna 

 and, in the male, there is an appendix masculina on the second 

 pair. 



The telson (text- fig. 3g) is rather broad. It bears two pairs 

 of dorsal spinules, both situated in the distal half of its length. 

 At the apex it is armed with four pairs of slender spines ; of these 

 the outermost are the shortest and the next pair the longest. The 

 variation noticed by Miss Rathbun in the number of terminal 

 spines does not seem to occur in this species. The outer uropod 

 (text-fig. 3/?) is about three and a half times as long as wide ; the 

 outer margin terminates in two short spines, the inner of which is 

 movable. 



The largest specimen is only yh mm. in total length. The 

 eggs are large for so small an animal ; they are rather shrunken 



