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



like pile, crossed by transverse ridges disposed as in T. sima, admeta, 

 etc. — i.e., tliere is an additional ridge extending across the cardiac and 

 neighbouring parts of the branchial regions — bat they are all faint. 



Front cut into six lobes {not including the inner supra-orbital 

 angles) very similar to those of Gharyhdis ( = Goniosoma) calUanassa, i.e., 

 the middle two are narrow rounded and more prominent than the others, 

 the next on either side are broad, and the third on either side are very 

 narrow and are subacute. 



Antero-lateral borders straight, cut into 5 acute teeth (including, 

 as usual, the outer orbital angles) of which the first 3 are large, the 

 5th very small, and the 4th a rudiment. 



Posterior border straight, but forming a curve with the postero- 

 lateral borders, its length hardly more than two-fifths the greatest 

 width of the carapace. 



Orbits large, their major diameter more than two-fifths the width 

 of the interorbital space : the inner angle of the lower border not denti- 

 form. 



The basal antenna-joint is not equal to the major diameter of the 

 orbit in its extreme extent : its crest is low and denticulated. 



Chelipeds markedly unequal in the adult male, their upper surface 

 with close-set vesicular granules : two or three enlarged spines on the 

 anterior border of the arm, none on the posterior border : inner angle 

 of wrist spiniform, two or three minute points on the outer angle : hand 

 not costate, with only two distinct spines, — one being in front of the 

 apex of the wrist-joint, the other, which is the larger, being some way 

 behind the finger joint : [the other spines usually present in Thalamitay 

 if present, are not distinguishable from the general granulation]. 

 Fingers shorter than the hand, especially in the larger cheliped. 



First 3 pair of legs long and slender, banded with brown. The 

 merus of the last pair is more than twice as long as broad and has the 

 usual spine on the posterior border : there are also a few spinules on 

 the posterior border of the propodite of this pair. 



Sixth abdominal tergum of male a good deal broader than long, its 

 sides parallel in their proximal half and then suddenly converging. 

 A single male from off Ceylon, 34 fathoms. 



A small species, the carapace being 8 millim. long, and ITS millim. 

 broad. 



58. Thalamita exetastica n. sp. 



Closely resembles T. investigatoris, from which it differs in the 

 following particulars : — 



(1) the median frontal teeth are on a lower plane than, and are 

 almost as broad as, the submediau teeth : 



