1899.] A. A\cock-r-Carcinological Fauna of India. 83 



Thalamita savignyi, A. Milne Edwards, Archiv. da Mus. X, 1861, pp. 357 aad 

 367, and Nouv. Arohiv. da Mus. IX. 1873, p. 163 : Koasmaun, Eoise roth. Meer. 

 Crust, p. 49 : de Man, Notes Leyden Mus. II. 1880, p. 180, and III. 1881, p. 99 ; 

 and Journ. Linn. Soc . Zool. XXH. 1887-88, p. 73 ; and Zool. Jahrb., Syst. etc., 

 VIII. 1894-95, p. 564: Oano, Boll. Soc. Nat. Nap. III. 1889, p. 215 : J. R. Hender- 

 son, Trans. Linn. Soc, Zool., (2) V. 1893, p. 372: Ortmann in Semon's For- 

 Bchungsr. (Jena. Denk. Vlll). Crust, p. 46. 



Carapace only about five-ninths to three-fifths as long as broad, 

 pilose, flat, crossed transversely by granular ridges which have the 

 same disposition as in T. danse, crenata, etc., except that, as in T. chap- 

 talii, sima etc., there is an additional one across the cardiac region and 

 extending, with an interruption, on to either branchial region. 



Inter-orbital space divided into four square-cut lobes of nearly equal 

 width : the middle two, which form the front proper, are laminar and 

 are considerably the more prominent: the outer two, which are the 

 broad inner supra-orbital angles, have a straight, or inappreciably 

 curved anterior border. 



Antero-lateral borders cut into 5 acute claw-like teeth, oE which 

 the 4th is much smaller than the others and is often rudimentary. 



The posterior border of the dorsum of the carapace forms a curve 

 with the postero-lateral borders : its length is a little less than a third 

 the greatest breadth of the carapace. 



The orbits have no particular dorsal inclination, their major dia- 

 meter is about a fifth the width of the inter-orbital space, the inner angle 

 of their lower border is bluntly dentiform. 



Basal antenna-joint nearly a fourth the greatest breadth of the 

 carapace in extent: its orbital extension traversed by a serrated crest, 



Chelipeds unequal in the adult male. Three enlarged teeth on the 

 anterior border of the arm : the posterior border granular in its distal 

 half. Upper and outer surface of wrist costate and slightly gratiular, 

 2 or 3 spinules at the outer angle, the inner angle strongly spiniform. 

 Hand full and deep, with 5 costse on the upper and outer surfaces : on 

 the upper two costge are altogether 6 spines, of which the distal two are 

 the smallest: the other surfaces of the hand are generally smooth, but 

 there may be a faint bulge or ridge along the inner surface and an 

 incomplete line of granules along the lower border. Fingers a good 

 deal shorter than the hand (especially in the larger cheliped) rather 

 stumpy, and though sharp-pointed showing an inclination tb be chan- 

 nelled along the inner surface : the dactylus is decidedly hook-like. 



In some individuals the hand, except for the two spinose costae on 

 the upper surface and for traces of two costas on the outer surface, is 

 quite smooth. In others there are only four distinct spines on the 

 hand,— -the two small ones immediately behind the finger-joint being 



