400 A. Alcock — Garcinological Fauna of India. [No. 3, 



strongly convergent posteriorly, and have no spine behind the acute 

 outer orbital angle. 



Front about three-fifths the greatest breadth of the carapace, 

 moderately deflexed, its free edge slightly sinuous. Orbits little 

 oblique, their major diameter more than a third the breadth of the 

 front, their lower border not denticulate. 



The chelipeds in the male are subequal and vastly more massive 

 than the legs, and are about twice the length of the carapace, and, 

 except for some squamiform markings on the arm, are smooth : the 

 inner border of the ischium and both borders of the arm are crenulate, 

 and the distal end of the inner border of the arm is expanded to form 

 a denticulate lobe : the inner angle of the wrist is dentiform : the 

 fingers are stout and blunt. 



Of the legs the two middle pairs are the longest, being not twice 

 the length of the carapace. In all the last three joints are bristly, and 

 the memo has a spine at the far end of the anterior border and two 

 largish spines at the far end of the posterior border. 



The terminal joint of the male abdomen is simply triangular. 



A small species: the carapace of the single specimen (from Mergui) 

 in the Indian Museum is 6*5 millim. long and 10 millim. broad. 



Subfamily Varunin^e. 



Varuna, Edw. 



Varuna, Milne Edwards, Diet. Hist. Nat. XVI. p. 511 (1830), and Hist. Nat. 

 Crust. II. 94, and Ann. Sci. Nat. Zool., (3) XX. 1853, p. 176 : Kingsley, Proc. Ac. 

 Nat. Sci. Philad. 1880, pp. 188, 205 : Miers, Challenger Brachyura, p. 265. 



Trichopus, De Haan, Faun. Japon. Crust, p. 32. 



Carapace very little broader than long, depressed, with thin sharp 

 edges, the regions fairly well indicated. Front a little more than half 

 the breadth of the anterior border and a little more than a third the 

 greatest breadth of the carapace, straight, prominent, sublaminar, little 

 deflexed. Antero-lateral borders of the carapace arched, cut into 3 teeth 

 including the outer orbital angle. 



Orbits small, of good depth, their lower border broken and incom- 

 plete. The antennules fold obliquely and the interantennulary septum 

 is broad. Antennae of fair size, standing in the orbital hiatus. 



Epistome of good length, well defined. Buccal cavern square. 

 The external maxillipeds gape, but not very widely : their exognath is 

 not nearly as broad as the ischium : their merus is shorter, but anteri- 

 orly much broader, than the ischium, its antero-external angle being 

 considerably produced, so that the palp articulates near the middle of 

 the anterior border. i 



