1895.] 
A. Alcock — Ccircinological Fauna of India. 
199 
tennal joint narrowing 1 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 legs 
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). 
Acanthovyx macleayi , Krauss. 
Acanthonyx macleayi, Krauss, Sudafrikan. Crust., p. 47, pi. iii. fig. 6. 
Acanthonyx macleayi, Miers, ‘Challenger 1 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 
setae ; and on the gastric region in a line with the hepatic spines are two 
elevated tufts of setae. 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 Reunion, An¬ 
nexe F. p. 7, pi. xvii. figs. 3, 3b. 
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. Latero- 
