11YPOCTONUS. 113 



smooth, its anterior edge also smooth, concave in its basal, convex 

 in its distal half, forming an ~- like curvature, the apex truncated, 

 and armed with one inferior and one median tooth ; hand con- 

 siderably longer than wide, smooth and sparsely punctured above 

 and externally, granular internally, the inner edge with a sharp 

 constriction in its basal half, the margin from the tip of the 

 finger down to the constriction lightly concave and denticulate 

 throughout its length ; movable finger evenly curved. Legs of 3rd 

 and 4th pairs with spine at apex of tibia. Ommatoid,s separated 

 by a space which about equals their diameter. 



Total length 27 mm. 



LOG, Sylhet. 



04. Hypoctonus binghami, Oates, J. A. S. B. Iviii, p. 15, 1889 



(Tlielyphonus) ; Kraep. Abh. Ver. Hamb. xv, p. 47, fig. 50, 1897 ; 



id. fierr., Scorp. etc. p. 230, 1899 (Hypoctonus) : formosus, 



Simon, J. A. S. B. Ivi, p. Ill, 1887 ; Pocock, Journ. Linn. Soc., 



Zool. xxiv, p. 316, 1892 (nee formosus, Butler). 

 cJ . Colour of upper side of body black ; chelae black or deep 

 brown, redder at the extremity ; lower surface yellowish red or 

 reddish brown ; legs entirely pale red ; caudal flagellum red. Sculp- 

 turing of upper side of body much as in H. oatesii. Abdomina 1 sterna 

 finely punctulate. Chela with trochanter armed as in H. oatesii, but 

 the spines not so strong; femur granular, long, nearly twice as 

 long above as the anterior edge of the trochanter ; tibia granular, 

 its inner edge and basal half of apophysis granularly denticulate ; 

 apophysis much shorter than tibia, its posterior border practically 

 straight, its anterior border shallowly and evenly concave, the 

 extremity a little thickened, convex anteriorly and bidentate ; hand 

 dull, punctulate, with some large granules at the base of the 

 immovable finger, its inner edge denticulated, convex, base of 

 immovable finger shallowly concave. Ommatoids large, less than 

 their diameter apart. 



$ . First sternal plate of abdomen swollen in the middle, 

 marked with three shallow impressions, its posterior border widely 

 rounded and not mesially produced (fig. 36 F, p. 114). Chelce short ; 

 upper side of humerus more weakly granular than in male, of tibia 

 and hand not granular, sparsely punctured; tibial apophysis tri- 

 angularly spiniform, evenly narrowed to a point, its posterior side 

 armed with two subapical spinules, and one spinule followed by 

 shorter denticuliform granules at its base on the tibia ; its anterior 

 edge denticulate throughout ; inner edge of hand much straighter 

 than in c? . 



Total length about 30 mm. 



Loc. Tenasserim : Tavoy (Moti Ram) Eeef Island, at the 

 mouth of the Tavoy River (Oates) ; Owen Island in the Mergui 

 Archipelago (Anderson). 



05. Hypoctonus woodmasoni, Oates, J. A. 8. B. Iviii, pt. 2, p. 12, 



pi. ii, fig. 10, 1889 ; Kraep. Abh. Verh. Hamb. xv, p. 46, fig. 45, 

 1897 ; id. Tierr., Scorp. etc. p. 230, fig. 80, 1899 (Hypoctonus). 

 cJ . Colour black above and 011 chelae ; legs and sterna red. 



i 



