134 A. Alcock — Carcinological Fauna of India. [No. 3, 



thickly fringed with additional longer hairs. The hairs completely 

 conceal all the texture and sculpture beneath them. 



Carapace subcircular, slightly broader than long, flattish. The 

 true cervical groove is v^^ell defined, but the branchial groove is hardly 

 distinguishable. 



There are a few very inconspicuous symmetrically-disposed eleva- 

 tions on the gastric and on the anterior part of the branchial regions. 



Front broadly-triangular, deeply grooved in the middle line. 

 Upper border of orbit oblique, with a fold or notch (best visible from 

 inside the orbit) marking the equivalent of the inner supra-orbital angle 

 of the higher Brachyura. Outer orbital angle not dentiform. Suborbital 

 lobe neither dentiform nor prominent. 



Lateral borders of carapace with 5 spine-like teeth, the last of 

 which is much the smallest and stands at the branchial groove. 



Chelipeds in the male a little unequal, the smaller one not stouter 

 and not quite so long as, the larger one a little stouter and about as long 

 as, the first 3 pair of legs. 



When the chelipeds and legs are denuded their surface is smooth 

 and unsculptured, except that the posterior border of the dactyli of the 

 legs is serrated. 



The fourth (last) pair of legs are small slender rudiments, not a 

 fourth the length of the 3rd pair. 



A single male from off the Laccadives, 50 to 30 fathoms. Its 

 carapace is 10 millim. long and a little over 11 millim. broad. 



The smoothness of the carapace, chelipeds, and legs, and the 

 inequality of the chelipeds distinguish this species from D. hispidaj of 

 which, however, it may prove to be only a variety. 



AcANTHODROMiA, A. Milne Edwards. 

 Acanthodromia, A, Milne Edwards, Bull. Mus. Comp. Zool., VIII. 1880, p. 31 : 

 E. L. Bouvier, Bull. Soc. Philomath. Paris, (8) VIII. 1895-96, pp. 56, 67: Ortmann 

 in Bronn's Thier Reich, V. ii., Arthropoda, p. 1155, 



Differs from Dynomene in having the carapace longer than broad, 

 convex, and closely covered with spines instead of hairs. 

 Distribution : Caribbean Sea, Andaman Sea. 



3. Acanthodromia margarita, Alcock. 



Dynomene margarita^ Alcock, Investigator Deep-Sea Brachyura, p. 19, pi. ii, 

 fig. 3. 



The whole carapace and dorsal surfaces of the chelipeds and legs 

 are as closely as possible covered with spines and spinules : the under 

 surfaces of the body and legs, the eye-stalks, antennae, and external 

 maxillipeds are closely and crisply granular. 



