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



1888, p. 79, pi. V. fig. i, and Zool. Jahrb., Syst., VIII. 1895, p. 559 : Cano, Boll. Soc. 

 Nat. Napol. III. 1889, p. 218: Walker, Journ. Linn. Soc, Zool., XX. 1886-90, 

 p. 110 : Ortmann, Zool. Jahrb., Syst., VII. 1893-94, p. 81 '• Henderson, Trans. Linn. 

 Soc, Zool., (2) V. 1893, p. 374. 



Carapace not distinctly pilose, about two- thirds as long as broad, 

 sliglitly convex, nearly smooth to the naked eye, the regions ill-defined. 

 A finely granular curved line — broken on the gastric region — traverses 

 it between the last spines of either antero-lateral border, and two simi- 

 lar lines — the anterior widely broken in the middle — cross the anterior 

 part of the gastric region : these are the only ridges on the carapace, 

 and they become faint with age. 



The front is rather deeply cut into six prominent regular blunt- 

 pointed teeth, not including the inner supra-orbital angles, none of 

 which project much beyond the others. 



The antero-lateral borders are cut into six teeth including the outer 

 orbital angles, of which the first is truncated and notched or bifid, the 

 last is almost spine-like but is little more salient than the others, while 

 the other four are broad anteriorly-acuminate lobes. 



The posterior border of the dorsal surface of the carapace forms 

 a curve with the postero-lateral borders. 



The orbits have but little dorsal inclination : the major diameter 

 of their cavity is a third the width of the inter-orbital space : neither 

 the inner angle nor the lobule at the outer end of their lower border 

 are dentiform, though the latter lobule is well defined. 



The lobule at the antero-external angle of the basal antenna-joint 

 has a ridge, but not a tooth. 



The chelipeds are nearly 2| times the length of the carapace 

 (in the male) and except for definitely placed costae and spines are 

 smooth : the hands are a little unequal in size. The arm has three en- 

 larged spines on the anterior (inner) border and a spinule at the far end 

 of the inferior border, but the posterior border is unarmed. The wrist 

 has the inner angle strongly spiniform and has three spinules and some 

 smooth ridges on the outer surface. The hands are tumid but not 

 inflated ; they are 5-costate and have 4 spines on the upper surface. 

 In both hands the fingers, which are strongly toothed, are as long as 

 their palm. 



In the last pair of legs the merus is about three-fourths as long as 

 broad and has a spine at the far end of the posterior border ; the carpus 

 is unarmed, and there are one or two inconspicuous denticles near the 

 far end of the posterior border of the propodite. 



The abdomen in both sexes has the 2nd and 3rd terga bluntly 

 carinate : in the male the 6th tergum is much broader than long and 

 has curved and gradually convergent sides. 



