1899.] A. Alcock — Carcinological Fauna of India. 169 



their joints are long, slender, and cylindrical, except the palm of the 

 male, which is club-shaped : there are a few spines on the arm, but the 

 other joints are smooth : the fingers are not half the length of the 

 hand (palm). 



The first three pair of legs, though they increase slightly in length 

 from before backwards, are not very dissimilar in length, the first 

 pair being nearly 8 times the total length of the carapace. All their 

 joints are slender : the merus is spinate, the carpus sparsely spinate, 

 and the propodite is slightly dilated at the far end of the posterior 

 border where there are a few spines. 



The last pair of legs are between 4| and 5 times the total length 

 of the carapace and reach almost to — in the female even beyond — the 

 end of the carpus of the last pair-%ut one : the merus is rather sparsely 

 spinate, chiefly on the posterior border, and the propodite is plumed on 

 both sides so as to exactly resemble the vane of a feather : the dactylus 

 is extremely short. 



In both sexes the last abdominal segment is shaped like a spear- 

 head : in the female the 2nd and 3rd abdominal terga have a median 

 spine and the 4th has a spine at the proximal end of either lateral 

 border. 



Colours in spirit yellow. In life the carapace is reddish with 

 longitudinal stripes of dark red, the eyestalks chelipeds and legs are 

 closely cross-banded with red, and the eyes are purplish black. 



The carapace of an adult female, with eggs, is 11 millira, long. 



14 specimens from the Gulf of Martaban, 53 and 67 fathoms, and 

 from off the northern end of Ceylon, 28 fathoms. 



