452 A. Alcock — Carcinoloyical Fauna of India. [No. 3, 



covered with vesiculous and crystalline granules, which are largest 

 on the convexities. 



Front divided into two broad rounded lobes : antero-lateral border 

 of the carapace cut into three teeth including the orbital angle : 

 posterior border of the carapace raised, but not cut into well-spnced 

 lobules. 



Upper border of the orbit with two deep notches between the 

 inner and outer orbital angles, both of these angles having a concave 

 margin : lower border with two deep notches. There is a leaf-like 

 lobule on the granular eye-stalk, another at the outer angle of the basal 

 antenna-joint, and another in the gap between the antenna and the 

 outer angle of the buccal cavern. The exposed surface of the ischium 

 of the external maxillipeds is obliquely traversed by two ridges which 

 meet at the produced antero-internal angle of the joint. 



The chelipeds of the adult male are granular and downy and 

 are usually markedly unequal. The larger one is stout, is more than 

 \\ times the length of the carapace and has a swollen (subcylindrical) 

 club-shaped palm of which the length is not twice the greatest height : 

 the fingers are short and stumpy, the dactylus being little more than a 

 third the length of the palm, and meet only at tip : the smaller 

 cheliped of the male is short and slender, sometimes however it is 

 almost as large as its fellow. 



In the female the chelipeds are equal, are hardly longer than the 

 carapace and hardly stouter than the last pair of legs : they have a 

 palm which is as slender and nearly as long as the ischium, and 

 incurved fingers which nearly meet throughout their length. 



In the first 3 pairs of legs the merus is stout and broad with a 

 granular dorsal surface and coarsely and unevenly serrulate edges, the 

 anterior edge ending in a crest-like tooth ; the carpus is dorsal ly 

 carinate, and its anterior border has the form of a two-lobed carina; 

 and the propodite and dactylus are subfoliaceous owing to the depth of 

 the thin sharp carinas of their edges — these carina? being plumed. The 

 4th pair of legs are short weak and granular as far as the dactylus, 

 which is much shorter than the propodite. 



The 1st pair of legs are a little longer, the 4th pair a little shorter, 

 than the carapace : the 2nd and 3rd pairs are about If times the length 

 of the carapace. 



In both sexes all the abdominal terga, except the last, are trans- 

 versely carinate, the carinas of the 2nd and 3rd terga being most 

 conspicuous. Also on either side of the sternum there are two crests, 

 one behind the base of the last pair of legs, the other almost in a line 

 with the 3rd abdominal carina. 



