68 



Rostrum a depressed dorsally-grooved tootli, entire, or emarginate at 

 tip. Four spines on the anterior border of the carapace arranged as in 

 if. andamanica. 



The only enlarged spine of the lateral border stands alone on the hepatic 



region. 



Nine spines on the gastric region— two immediately behind the spines at 

 the base of the rostrum, the other seven in an open S-shaped curve across the 

 middle of the region. 



A single row of spines on the subocular region, which region is remarkably 

 hollowed for the reception of the retracted eye. Two spines, one above the 

 other, on the carapace beside the antenna-peduncle, in addition to the blunt 

 suborbital tooth. 



Eyes reniform, very large, their major diameter being one- sixth the breadth 

 of the carapace : the joint on which they are borne is as long as the slender 

 basal joint. 



Chelipeds slender, their arms and wrists distinctly slenderer than the 

 meropodites of the ambulatory legs : in the adult male they do not reach half- 

 way along the merus of the first pair of legs : they are covered with a short 

 inconspicuous velvet, with hardly any long bristles on the edges of the joints: 

 they are armed much as in H. andamanica, but the upjyer border of the hand is 

 spiny and the lower border faintly denticulate. The fingers, which have a sharp 

 entire cutting-edge, are as long as the rest of the hand. 



The ambulatory legs have the surface— especially the dorsal surface— of 

 most of the joints covered with a close short velvet, but have few or no bristles 

 alono- their edges. The 2nd and 3rd pair, which are nearly a dactylus longer 

 thaa°the first, are nearly three times as long as the carapace : the subcheliform 

 4th (last) pair reach beyond the end of the carpus of the preceding pair. The 

 first three pair have the anterior edge of their greatly compressed meropodite 

 closely spinate, and the posterior edges of that joint and the ischium closely 

 spinulate; their last three joints have the edges unarmed, except for a series of 

 fine capillary spinelets hardly distinguishable from bristles along the merus and 

 carpus, and a few small jointed spinules at the base of the posterior border of 

 the dactylus. The last pair of legs have the posterior edge of their subcylindrical 

 meropodite closely spinate and have only a single terminal spine on the upper 

 edo-e, the carpus has a strong terminal spine on its posterior border, and the 

 propodite has a salient group of spines behind the middle of its posterior border 

 forming a subcheliform stump for the serrated posterior edge of the claw-like 

 dactylus. 



Colour in life salmon-pink. 



