88 



The longitudinal suture of the carapace is continued some way behind the 

 gastric region. 



The median carination of the 2nd and 3rd (especially of the 8rd) abdominal 

 terga is, though not striking, quite distinct. 



The telson as a rule, though not always, is shorter, being often not much 

 longer than the 6th somite; its dorsal longitudinal groove is shorter; and as a 

 rule, to which in 118 perfect specimens I find only 4 exceptions, it has no late- 

 ral marginal spines. 



The antennular flagella are but little longer than their peduncle. The 

 external maxillipeds reach the middle of the antennal scale. 



The andricum consists of two compressed lobes, in contact all along their 

 inner border, the outer border being scalloped into three lobules — a broad, semi- 

 circular basal one, a long and narrow median one, and a small, recurved, peta- 

 loid one : from its distal end spring a pair of wing-like lobules, the posterior 

 surface of which is deeply channelled. 



The thelycum consists of a large hexagonal or leaf-shaped plate, lying be- 

 tween the 4th pair of legs and broadly articulating with a transverse plate, the 

 outer edges of which are notched, placed between the 5th pair of legs. 



This species reaches a length of 5| inches. 



There are 185 specimens in the Indian Museum, registered as follows : — 



7712 7720 7722 7268 4409-11 3394-95. 



