177 



cither orbital notch, and a spine on the impacted eyestalk. The ridges that 

 correspond with the lateral borders of Polycheles are spinose throughout, the 

 spines increasing in size posteriorly up to a very large terminal one : the ventral 

 submarginal ridges also running from the postero-lateral angles of the 

 carapace to the bases of the large chelipeds are conspicuously spinose. In the 

 middle line of the carapace is a carina on which some large spines stand, to 

 the number of 9 (not including the rostral pair) of which the 3rd, 6th, 7th and 

 9th are double. 



The abdominal terga, including the tergal element of the telson, all carry a 

 median upstanding spine, the middle three of which have each a spinelet at base. 

 There is a similar spine at either outer end of the abdominal terga, and one on 

 each pleuron. The edges of the pleura, telson, and caudal swimmerets are 

 spinulose. 



The eyestalks are impacted in the orbital sinuses, and from their antero- 

 external end a blunt conical process, which may be the remains of the eye, 

 projects. 



The antennular scale is narrowish and projects beyond the peduncle : the 

 basal joint of the peduncle has a spine at its outer angle : the inner (longer) 

 antennular flagellum is about half the length of the carapace. The narrow 

 antennal scale hardly reaches the end of the antennal peduncle : the renal 

 tubercle is an incurved styliform process of extraordinary length. 



The 1st pair of thoracic legs have the joints compressed, the ischium curved, 

 and the merus expanded at its proximal end, as in Polycheles : their length is 

 about equal to that of the carapace and first 5 abdominal somites combined : the 

 merus has some spinules along both borders and a spine at the far end of the 

 upper border, the club-shaped carpus has a spine at the far end of both borders, 

 and the palm has a spine at the far end of the upper border : the hand is nearly 

 as long as the combined ischium and merus, the palm is a little longer than the 

 wrist, but considerably shorter than the fingers : the fingers are slender, strongly 

 hooked at tip, and microscopically pectinate along the opposed edges. 



The 2nd-5th thoracic legs decrease slightly in length in posterior succession, 

 the 2nd pair being about gths the length of the 1st. All are chelate in the 

 female, but in the male the 5th pair is imperfectly so. 



Colours in life, pink ; or the carapace may be brownish, the abdomen dirty 

 white and the antennse and ends of the legs pink. 



In the largest specimen the length of the carapace is 25 millim., of the 

 abdomen 21 millim., of the large chelipeds 35 millim. 



Arabian Sea, off C. Comorin 480, 487 and 824 fathoms; Bay of Bengal, 

 690-920 fathoms. 



r, j XT 2123 ,m ,. ,, . \ 6016 3408 3804 



Regd. No. -jj- (Type of the species) :--: :_. 

 23 



