1898.] A. Alcock — Carcinological Fauna of India. 197 



117. ? Pilumnus hirsutus, Stimpson. 



? Pilumnus hirsutus, Stimpson, Proc. Ac. Nat. Sci. Philad., 1858, p. 37 : Miers, 

 P. Z. S. 1879, pp. 20, 31 : Haswell, Cat. Austral. Crust, p. 69 : Ortmann, Zool. 

 Jahrb., Syst., VII. 1893-94, pp. 435, 437. 



Carapace etc. covered with stiff hairs of two kinds — long and 

 short, the former most numerous on the legs. 



Carapace nearly f as long as broad, convex in both directions, 

 smooth when denuded, the regions hardly marked. 



Front about a third the greatest breadth of the carapace, deflexed, 

 cut into two lobes much like those of P. vespertilio in shape. 



Upper orbital margin smooth, with two very faint and shallow 

 notches ; lower margin denticulate, with a gap just below the outer 

 angle. No subhepatic tooth. 



Antero-lateral border much shorter than the postero-lateral, with 

 4 spiniform teeth, one of which is the orbital angle. 



Antennary flagellum of moderate length, without hairs, except at 

 base. 



Chelipeds unequal; borders of arm finely granular or denticulate, 

 wrists with the upper and outer surfaces rough and the inner angle 

 sharply pronounced ; lower part of outer surface of larger hand smooth, 

 the rest of this surface — like that of the smaller hand — sharply granu- 

 lar, the granules becoming spiniform towards the upper border. 



Legs rather slender, the longest pair about two-thirds again as 

 long as the carapace. 



Colours in spirit, yellow, fingers light brown. 



In the Indian Museum are 11 specimens, from the Andamans, 

 Mergui, and the Malacca Str. 



118. ? Pilumnus dorsipes, Stimpson. 



? Pilumnus dorsipes, Stimpson, Proc. Ac. Nat. Sci. Philad., 1858, p. 37. 



Carapace globose, extremely deep, not very much broader than long, 

 covered — like the chelipeds and legs — with soft, though stiff, hair, 

 fairly well areolated, finely granular under a lens. 



Front about a third the greatest breadth of the carapace, cut into 

 two convex, rounded, finely denticulate lobes, of which the outer angles 

 form dentiform lobules. 



Upper orbital margin not prominent, the two notches are very 

 faint and shallow (especially the inner one), but are recognizable : lower 

 orbital margin with a deep narrow cleft just below the outer angle. 



Antero-lateral margin cut into four denticulate spiniform teeth, 

 one of which is the outer orbital angle. No subhepatic tooth. 



