158 



The 3rd joint of the antennular peduncle is as long as or longer than the 

 1st, which has no stylocerite : the antennular flagella are shorter than the 

 carapace proper, the outer being decidedly the stouter. 



No antennal scale. 



1st pair of legs chelate, much the longest and stoutest, a little unequal in 

 the male ; though the joints are massive they are not cumbrous : 2nd pair some- 

 what compressed and a little stouter than those behind them, which are slender 

 and subcylindrical : the 2nd and 3rd pairs chelate. 



The rami of the abdominal appendages from the 2nd to the 5th are long 

 slender and setose. The modified 1st pair in the male are slender pointed, 

 lamellge, channelled along the inner surface. The male appendix of the endo- 

 podite of the 2nd pair is a long slender rod fringed distally with stiff setae. 



The branchial formula is as follows : — 



Total 



5 + 7 ep. 



10 



= 19+7ep. 



Key to the Indian species of Nephropsis. 



I. The exopodite of the tail-fan is transversely fissured : — 



1. Rostrum with lateral spines : no distinct spines behind the cervical 



groove : — 



i. No distinct spine on the anterior border of the 2nd 

 abdominal pleura : rostrum with only one pair of lateral 

 spines : — 



a. Abdominal terga without any trace of a median 



carina 



b. The abdominal terga, from the 3rd to the 6th, are 



faintly carinated in the middle line 

 ii. A spine near the middle of the anterior border of the 2nd 

 abdominal pleura 



2. Rostrum without any lateral spines : a pair of small spines over- 



hang the cervical groove from behind, in the middle line 

 Hi The exopodite of the tail-fan is not fissured : rostrum with lateral spines : at 

 least one spine on the anterior edge of the 2nd, 3rd and 4th abdominal 

 pleura 



N. Stewartii. 



N. Carpenteri. 



N. atlantica. 



N. ensiroitrii. 



N. Suhmi. 



