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



Chelipeds rather longer than the carapace ; a small lobule at the 

 far end of the anterior border of the arm, inner angle of wrist stoutly 

 spiniform, hand smooth except for a tiny tubercle in front of the apex 

 of the wrist joint. 



First 3 pairs of legs slender : merus of last pair less than twice as 

 long as broad, its posterior border ending in an almost dentiform carina. 



6th abdominal tergum of male broader than long, broadest in the 

 middle, its sides therefore curved. 



In spirit the carapace is white with some purplish-brown mark- 

 ings. 



In the Indian Museum are 9 specimens, from off Ceylon 26| fms., 

 off the Malabar coast 26-31 fms., off Mergui 40 fms. and from the 

 Andamans. 



The largest specimen has a carapace 9*5 inillim. long and 11 

 millim. broad. 



Sub-family III. LUPINE. 



Alliance I. Lupocycloida. 



LupOCYCLUS, Adams and White. 



Lupocyclus, Adams and White, Samarang Crust, pp. 46, 47 : A. Milne Edwards, 

 Ann. Sci. Nat., Zool., (4) XIV. 1860, p. 228, and Archiv. da Mas. X. 1861, p. 387 : 

 Miers, Challenger Brachyura, p. 185 (not subgenus Parathranites). 



Carapace little broader than long, or even sub-circular, convex, 

 the regions faintly indicated, with granular transverse ridges of definite 

 position. 



Front proper (not including the rather obscurely defined redupli- 

 cated inner supra-orbital angles) prominent and cut into 4 teeth. 



Antero-lateral borders moderately oblique and moderately curved, 

 about equal in length to the postero-lateral, cut into 5 or 6 teeth 

 (including the outer orbital angle) with little denticles in some or all 

 of the interdental spaces, bringing the total number to 9. (The den- 

 ticles are sometimes so small as to escape notice). 



Orbits large with a considerable dorsal inclination : the upper 

 border with 2 fissures : the inner angle of the lower border though 

 dentiform does not project anywhere near the level of the tips of 

 the middle frontal teeth. The antennules fold transversely. 



Basal antenna- joint about as long as broad, filling the orbital 

 hiatus ; not quite firmly fixed ; flagellum long, standing in the orbital 

 hiatas. 



Epistome short, somewhat sunken. Buccal cavern somewhat 

 broader than long : efferent branchial channels well defined. 



