1899.] A. Alcock — Garcinological Fauna of India. 157 



Carapace elongate-subquadrilateral, its greatest breadth is across 

 the middle of the gastric region, behind which point its sides are quite 

 straight and vertical : it is well calcified, and, like all other parts except 

 the antennary flagella, is covered with short soft bat stiff hairs that are 

 not thick set enough to form a coat of concealment. 



Rostrum a depressed grooved tooth, bifid at tip. Four spines on 

 the anterior border of the carapace, namely, one on either side of the 

 rostrum, one at either supra-orbital angle. 



Lateral borders of dorsum of carapace straight, very slightly con- 

 vergent, spinate ; the first spine, which stands alone on the hepatic 

 region, is of pre-eminent size, the second though much smaller than the 

 first is much larger than any of the others. 



Gastric region very well demarcated, armed with nine large spines 

 • — three in a triangle on either median area, one on either lateral area, 

 and one on the hinder part of the central area. 



Some spines on the subocular, subhepatic, and pterygostomian 

 regions — largest on the subocular region, where they are definitely 

 arranged in two crescentic rows. Two spines, one beside the other, on 

 the carapace outside the antenna-peduncle, in addition to the spinuliform 

 suborbital angle. 



Eyes somewhat reniform. 



Chelipeds slender, but distinctly stouter than the legs, more hairy 

 than the carapace, especially along the edges of the joints. Upper and 

 lower borders of arm spiny ; wrist with rows of spines on the outer 

 surface and a spine or two at the inner angle ; lower border of hand 

 spiny, upper border of hand denticulate, cutting edges of fingers sharp, 

 entire. 



Legs compressed, their edges plumed with short bristles, with long 

 bristles interspersed. The second and third pair, which are a dactyl- 

 length longer than the first, are not quifce 2^ times the length of the 

 carapace : in all three pairs both edges of the merus are armed with 

 stout spines — at least in the distal half, and the posterior border of the 

 propus and dactylus with compressed articulated spines which are 

 distant and acicular on the propus but stout very regular and close-set 

 on the dactylus. 



The subcheliform fourth pair of legs reach very slightly beyond 

 the end of the carpus of the preceding pair: the merus has 3 or i spines 

 on the lower border and a terminal spine on the upper border, the claw- 

 like dactylus closes against a bunch of spines on the near end of the 

 propus. 



In the Indian Museum are a male and female from the Andaman 

 Sea, 79-90 fathoms ; the carapace of the female is about 27 millim. 

 long, and about 21 millim. wide. 



