]72 A. Alcock — Carcinnlogical Fauna of India. [No. 1, 



Basal antennal joint prolonged into the orbital hiatus — and filling 

 it — on the same extensive scale as in Chlorodopsis areolata. 



Chelipeds very little unequal, not much longer and stouter than 

 the legs, about If times the length of the carapace : arm with several 

 spinules along the posterior border and two large ones on the anterior 

 border ; wrist and hand with numerous sharp spine-like tubercles, which 

 fall into longitudinal series on the outer suiface of the hand; fingers 

 with some coarse spinules at base, rather strongly arched, broadened 

 and hollowed at tip. 



Legs granular, somewhat furred, the upper border of the mero- 

 podites carpopodites and propodites spinate. 



The grooving of the under surface of the carapace, found in all 

 the species of Chlorodius, Chlorodopsis, &c, is particularly elegant. 



In the Indian Museum is a male from the Andamans (and one 

 from Mauritius). 



Alliance III. Cymoida. 



Ctmo, De Haan. 



Cytno, De Haan, Faun. Japon. Crust, p. 22. 



Cymo, Dana, Amer. Journ. Sci. and Arts. (2) XII. 1851, p. 126 ; and U. S. Expl. 

 Exp. Crust, pt. I. p. 224. 



Carapace about as long as broad, subcircular, or less commonly 

 elongate-pentagonal ; not, or little, convex ; depressed, with regions and 

 subregions faintly or not at all shown. 



Frouto-orbital border from about f to J the greatest breadth of 

 the carapace in extent. Front from about -| to about ^ this measure, 

 horizontal, bilobed, with the outer angle of each lobe prominent and 

 separated from the supra-orbital margin by a notch and groove. The 

 grooves of the orbital margin are either indistinguishable or distinct. 

 Eves on short thick stalks. 



The antennules fold obliquely. The basal joint of the antennae has 

 its outer angle produced into the orbital hiatus, and the flagellum, 

 which is short, is situated between this process of the basal joint and 

 the front. 



The chelipeds are remarkablv unequal in both sexes, the larger 

 cheliped, in adults, being more than half again as long and more than 

 twice as massive as the smaller : the fingers of the larger cheliped are 

 short, thick, blunt-pointed (beak-like) aud hollowed at tip; those of the 

 smaller hand, though also hollowed-out, are long and slender. 



The legs are invested and fringed with a thick shaggy fur that en- 

 tirely conceals their sculpture : they are short and massive. 



