286 



Mr. E,. I. Pocock on some 



distal half), and I can see nothing of the nature of a blunt 

 bifid sj)ine or process arising from the lower side of tiie 

 maxillffi, there being at most a low and undivided prominence 

 here. Moreover, on the coxae of the first leg there are 

 distinctly four processes visible below, one a largish conical 

 eminence situated in the middle of its lower surface, a second 

 small blunt tooth-like one on its anterior surface just below 



All the 

 distinct 



Fig. 1. — Oiicopus Hosei ; head and mandible. 

 Fig. 1 a. — Ditto ; coxae of second and third legs. 

 Fig. 2. — Onvojius alticcps ; head and mandible. 

 Fig. 2 a. — Ditto ; coxal area of carapace. 



the maxilla, and the other two on its distal margin, 

 trochanters are without tubercles, but there is a 

 ])rocess at the base of the uppcrside of the femur of the 

 second leg. 



Measurements in viWimetres. — Total length of trunk 9*3 ; 

 length of carapace 3, width 3; width of abdomen 5; length 

 of first leg (excluding coxa) 9, of second 13, of third 9, of 

 fourth 13-5. 



Loc. Baram, Borneo. A single specimen obtained by 

 Mr. C. Hose. 



From the other known species of Oncopus, namely 0. Feip^ 

 Thorell (Ann. Mus. Gcnov. xxx. p. 375, lb90), from Pinang, 

 and 0. truncatusj id. {torn. cit. p. 704), from JSingapore, this 

 new species seems to difler in the same respects as those 

 pointed out by Thorell as distinctive of 0. Dorkv. 



