23 



the chelipeds are only asymmetrical as regards the fingers, which on one hand 

 have on their outer aspect, near the base, a stout lobule.* The legs are large, 

 the first two pairs being at least as long as the chelipeds. 



The abdomen in the male is as broad in the proximal half as it is in the 

 female : in the adult male it consists of five segments, the 3rd, 4th and 5th 

 being intimately fused, the sutures even being hardly distinguishable : in both 

 sexes the tergum of the 1st somite is almost entirely concealed, and that of the 

 2nd somite strongly carinate transversely. 



MuTsia is practically Calappa without the mngs to the carapace, and with 

 large strong legs : the widely fissured orbital floor, the less pronounced endos- 

 tomial septum, and the slender basal antenna-joint are the other important 

 points of difference. 



Mursia Mcristiincma, Alcock and Anderson. Plate III. fig. 3. 



Mursia hicristimana, Aicock and Anderson. Journ. Asiatic Soc. Benfjal, Vol. LXIII. 1894, pt. 2, p. 179 ; and 

 111. Zool. 'Investigator' Crust, pi. xxiv. fig. 5 : Alcock, J. A. S. B., Vol. LXV. pt. 2, 1896, p. 150. 



The length of the carapace is about seven-ninths of the breadth immediately 

 in front of the lateral epibranchial spine ; and the length of the epibranchial 

 spine is from one-third (in the young) to less than one-fourth (in the adult) the 

 length of the carapace. 



The surface of the carapace is closely granular, and in addition there are 

 seven rows of tubercles, one in the middle line, and three on each side rachating 

 over the branchial regions : the antero-lateral margins are finely beaded and 

 evenly and sharply festooned : the postero-lateral margins are without the 

 angular bend inwards seen in M. armata : the posterior margin is hounded, on either 

 side by a laminar denticle, not by a great projecting lobule as in M. armata. 



The outer parts of the pterygostomian and subhepatic regions are covered 

 with a dense felt of long hairs. 



The rostrum is trilobed, its breadth at the level of the lobes being about one- 

 half more than the greatest breadth of the orbit. 



The transverse ridge near the distal end of the arm is very hairy, and is 

 armed distally with two spines, the outer and larger of which is more than half 

 the length of the lateral epibranchial spine. This ridge is continued along the 

 palm as a sharp longitudinal crest (more prominent even than that of Platymera) 

 which is unevenly trilobed, the proximal lobe being spiniform, the middle lobe 

 broad and obtuse, and the distal lobe narrow and obtuse. The upper surface of 

 the wrist, and the outer surface of the palm and fingers, are closely and sharply 

 granular : the upper edge, or crest, of the palm is 7-serrate. 



* In Mursia hmoaiiensis, Mary J. Eathbnn, Pr«c. United States National Museum, xvi. 1893, p. 252, the 

 ohelipeds are described as very unequal. 



