00] A. Alcock — Cardiological Fauna of India. 313 



the Xanthidse: it may" prove to belong to that family, where I have 

 already, -with reserve, placed it. 



I may here, however, state that it closely resembles Pilumnoplax, 

 having a flat, depressed, slightly transverse carapace. It differs from 

 Pilumnoplax in the following particulars : — 



(1) the front is more prominent, so that the carapace is more 

 decidedly hexagonal : 



(2) the fronto- orbital border is sharply serrated and the chelipeds 

 and legs are profusely spiny : 



(3) the external maxillipeds do not completely close the buccal 

 caveru, but leave a wide gap between their anterior margin and the edge 

 of the epistome : 



(4) the dactyli of the legs are styliform. 

 Distribution: Andaman Sea.] 



[Platypilumnus gracilipes t Wood-Mason. 



Platypilumnus gracilipes, Wood-Mason MS., Alcock, Ann. Mag. Nat. Hist., May, 

 1894, p. 401: 111. Zool. Investigator, Crust., pi. xiv. fig. 6: J.A.S.B. Vol. LXVII, 

 pt. 2, 1898, p. 232 : investigator Deep Sea Brachyura, p. 63. 



A description of the female (which is the only sex known) has 

 been already given in this Journal (loc. dt.)~\. 



Litochira, Kinahan. 



Litochira, Kinahan, Journ. Koy. Soc. Dublin, I. 1858, p. 121 : Miers, Challenger 

 Brachyura, p. 231. 



? Brachygrapsus, Kingsley, Proc. Ac. Nat. Sci. Philad. 1880 (1881) p. 203. 



Carapace and appendages in all the Indian species thickly 

 tomentose and hairy. 



Carapace deepish, either subquadrilateral and a good deal broader 

 than long, or almost square, smooth, with little or no distinction of 

 regions, flat, but declivous anteriorly. Fronto-orbital border not much 

 less than, if not equal to, the greatest breadth of the carapace : antero- 

 lateral borders short and if arched at all, very slightly so, and usually, 

 but not always, with 2 or 3 teeth or spines. 



Front not well delimited from the supra-orbital angles, its free 

 edge deflexed and somewhat arched, never square-cut and laminar ; 

 more or less distinctly bilobed. 



Upper border of orbit entire. The antennal flagellum, which is 

 of good length, stands in the orbital hiatus. The antennules fold 

 transversely, or nearly so. 



Mouth and external maxillipeds a3 in Eucrate, &c. 



