Carcinological Fauna of India. 199 



tennal joint narrowing slightly from the base to the distal extremity, 

 which is unarmed ; flagellum exposed and visible from above at the side 

 of the rostrum. Merus of the exterior maxillipeds truncated at the 

 distal extremity and but slightly notched at the antero-internal angle, 

 where it is articulated with the next joint. Chelipeds (in the adult 

 male) well developed ; palm compressed, but slightly turgid in the mid- 

 dle, and often slightly carinated above ; fingers acute, and having be- 

 tween them, when closed, an interspace at the base. Ambulatory le^s 

 short, with the penultimate joints more or less dilated and compressed 

 and armed with a tooth or lobe on its inferior margin, against which the 

 small acute dactylus closes. (Miers). 



Acanthonyx macleayi, Krauss. 



Acanthonyx macleayi, Krauss, Sudafrikan. Crust., p. 47, pi. iii. fig. 6. 

 Acanthonyx macleayi, Miers, 'Challenger' Brachyura, p. 43. 



Carapace sub-quadrangular, with the hepatic and lateral branchial 

 spines well developed-: these spines, as well as the spines of the rostrum 

 and the carapace immediately behind the rostrum, are tufted with 

 setse ; and on the gastric region in a line with the hepatic spines are two 

 elevated tufts of setas. Except for the spines and elevations above- 

 mentioned, and for a slight median elevation in its posterior half, the 

 carapace, both as to its margins and as to its surface, is perfectly smooth 

 and unarmed. 



The supra-ocular spines are parallel with, and in the female almost 

 comparable in size with the rostral spines. 



The chelipeds in the male, but not in the female, are much stouter 

 than any of the other legs : in the male they are nearly as long as the 

 carapace, and have the carpus and palms much inflated, and the fingers 

 in contact only at their tips : in the female they are only about two- 

 thirds the length of the carapace, and have the joints slender, and the 

 fingers closely apposable throughout. 



The other legs, which are subchelate, are not disproportionately 

 short compared with the chelipeds : the last pair is sub-dorsal in position. 



In the Museum collection are specimens from Karachi. 



Acanthonyx consobrinus, A. Milne-Edwards. 



Acanthonyx consobrinus, A. Milne-Edwards, in Maillard's l'lle de la Keunion, An- 

 nexe F. p. 7, pi. xvii. figs. 3, 3&. 



Acanthonyx consobrinus, Heller, ' Novara ' Crustacea, p. 5. 



" Carapace broadened, and a little swollen, surface non-granular. 

 Gastric region with three ill-defined tubercles. Cardiac region either 

 smooth or with sometimes a trace of a rudimentary tubercle. Latere- 

 45 



