Indian Deepsea Drciljimj. 323 



tliird the length of the cara])ace, and the orbital spines, which 

 are slightly inclined npwards, are two thirds the length of 

 the rostrum, — all three being very distinctly squamous. The 

 anterior margin of the carapace on either side of the rostrum 

 is concave and without any obliquity ; the ])osterior margin 

 lias a ])air ot" s])ines, one on either side of tlic middle line ; 

 the lateral margins are armed each with five spines. The 

 gastric area is very distinctly delimited and is armed in front 

 with two (and only two) spines, which stand immediately 

 behind the supraorbitals and are about a third the length of 

 these. The cardiac area also is very distinctly defined, and 

 is surmounted centrally by a large spine and flanked on each 

 side, just behind the bifurcation of the cervical groove, by a 

 similar spine. The transverse ridges are well developed and 

 are strongly and sharply beaded and thickly and very finely 

 setose. 



The abdominal tcrga also arc most beautifully sculptured 

 with similar ridges, transverse and concentric ; the second, 

 third, and fourth terga are armed on their anterior margin 

 each with four distant spines, the middle pair of whicli are 

 large and conspicuous, and tlie fourth also has in its hinder 

 portion and in the middle line a single spine. 



The eyes are large, their major diameter being more than 

 one fourth the length of the carapace, and the eye-stalks on 

 the upper surface have several setose squames ; the corneal 

 region is compressed and closely fringed with setai at base. 



The spines on the basal joint of the antennules are not 

 large, only the outer terminal spine and the anterior of the 

 two marginal spines being of noticeable size. 



The antenna! peduncles are scaly ; the basal joint has a 

 small tubercle at its internal angle, and the second and the 

 tliird joints have each a spine in the same situation; the 

 flagellum is very little longer than the chelipeds. 



The external maxillipeds are very hairy and have the 

 exposed surface of the ischium and merus scaly, the former 

 joint being serrated, up to a large terminal spine, along the 

 inner edge, and the latter having a similar spine near the 

 middle of the inner edge. 



The thoracic legs are long, slender, and most remarkably 

 squamous, the scales being fringed with fine seta3. The 

 chelipeds, which are relatively both stouter and longer in the 

 male, are in that sex one third of their own extent longer 

 than the body with the rostrum, being also a little unequal ; 

 the merus, which is almost square in transverse section, has 

 three regular rows of spines on its upper and inner face ; 

 and the carpus and propodite, which are almost cylindrical, 



