128 A. Alcock — Carcinological Fauna of India. [No. 1, 



54. Orphnoxanthus microps, Alcock and Anderson. 

 Xanthodes microps, Alcock and Anderson, J. A. S. B. LXIII. pt. 2, 1894, p, 183. 



Carapace about f as long as broad, almost quadrilateral in outline, 

 strongly convex fore and aft, but, owing to the inflation of the brancliial 

 regions, a little concave from side to side ; it is rather closely covered 

 with a very fine short fur, beneath which the surface may be granular 

 or nearly smooth, but the margins are always granular. The regions 

 are all well defined and are slightly tumid : the gastric region is divided 

 into 3 gently tumid subregions, the branchio-hepatic regions are sub- 

 divided transversely into three areas, and the fronto-orbital margin is 

 also marked off. 



The antero-lateral border is thin and sharp and is cut into four 

 sharp finely granular teeth, the first of which runs by a long nearly 

 transverse margin, into the (undefined) angle of the orbit. The front is 

 laminar and projects beyond the supra-orbital margin ; it is square-cut 

 and is slightly notched in the middle line, so as to form two broad shallow 

 lobes. The eyes are small and are to a variable extent deficient in 

 pigment. 



The chelipeds are unequal — very much more so in the male than in 

 the female : the arm to a variable extent, the entire surface of the 

 wrist, and the upper border of the hand are scabrous and more or less 

 hairy ; the other surfaces of the hand may be smooth and polished, 

 or the outer surface may be to a variable extent granular : the fingers 

 are large, compressed and pointed. 



In the male the larger cheliped is about 2J times the length of the 

 carapace (the hand and fingers forming slightly more than half the 

 length) and nearly half the arm projects beyond the carapace in repose. 



The legs are long slender and finely and sparsely hairy : the upper 

 edge of the meropodites is scabrous or closely spinulate. 



Colours in spirit ; chestnut brown with blackish fingers. Length of 

 carapace (average) 11 millim., breadth 15 to 16 millim. 



In the Indian Museum are 29 specimens from the Bay of Bengal, 

 105-350 f ms. 



Etisus, Milne Edwards. 



Etisus, Milne Edwards, Hist. Nat. Crust. I. 410. 



Etisus, Dana, Silliman's Amer. Journ. Sci. and Art. (2) XII. 1851, p. 126 ; and 

 U. S. Expl. Exp. Crust, pfc. I. p. 183. 



Etisus, A. Milne Edwards, Ann. Sci. Nat., Zool., (4) XX. 1863, p. 291 ; and 

 Nouv. Archiv. du Mus. IX. 1873, p. 233. 



Etisus, Miers, Challenger Brachyura, p. 131. 



Carapace broad, moderately convex in both directions, with the 



