157 



bears from one to three teeth dorsally : the margins of its broad basal portion 

 are armed each with one spine, and are continued backwards to the hinder part 

 of the gastric region each as a bold serrated carina. 



In the middle line the carapace is traversed throughout its extent by a 

 spinose carina. The cervical groove is conspicuous. The post-antennal spine 

 is of good size, and there are several small spines in a line behind it. 



The 3rd joint of the antemmlar peduncle is longer than the 2nd, but 

 shorter than the ] st. The antennal scale is about two-fifths the length of the 

 carapace proper, measured in the middle line ; its outer border is thickened and 

 .ends acutely, and its dorsal surface in the adult is spinulose. In the antennal 

 peduncle the outer border of the 2nd joint, the ventral border of the 3rd joint, 

 and the inner border of the remarkably elongate 4th joint end each in a spine. 



The large chelipeds in the male are as long as the body from the tip of the 

 rostrum to the end of the telson, more than half their length being contributed 

 by the hand, while of the hand itself nearer two-thirds than half is formed by 

 the fingers : in addition to the prickles that cover their surface, there is a row 

 of spines along the ventral border of the merus and another along the dorsul 

 border of the dactylus, as well as some enlarged spines at the distal end of 

 merus and carpus, and one on either side of the broadened base of the dactylus : 

 the much compressed fingers are furnished with teeth of about 5 different sizes, 

 elegantly arranged in alternating systems. 



The 2nd pair of legs, which reach just beyond the base of the fingers of 

 the 1st pair, are much longer and distinctly slenderer than any of the other three 

 pairs. 



Colour in life, delicate pink. 



In the largest specimen of our collection the length of the rostrum is 42'5 

 millim., of the carapace 77 millim., of the abdomen 139 millim. 



From the Arabian Sea, 550, 636, 740, and 912-931 fathoms. 



t, , w 5989 9306 45 1385 



Regd. Nos. _:—:-:_ 



Nephropsis, Wood-Mason. 



Nephropsis, Wood-Mason, Journ. Asiatic Soc. Bengal, Vol. XLII. pt. 2, 1873, p. 39, and Ann. Mag. Nat. Hist., 

 (4) XII. 1873, p. 59: Spence Bate, Challenger Crust. Macrura, p. 175. 



Rostrum of good length, stout, with or without lateral spines. Carapace 

 (without rostrum) more than half the length of the abdomen, the cervical groove 

 very well defined. Telson quadrate but somewhat elongate, about as long as 

 the caudal swimmerets, the outer of which usually (but not in every species) has 

 a transverse suture. 



Eyes very small, without pigment, hardly differentiated from the eyestalke, 

 which lie close together beneath the rostrum. 



