A NEW SPECIES OF MONKEY. 355 



greyish yellow ; at the end is a tuft of yellow hair 

 an inch and a half long. The arms of the animal 

 reach almost to the knee when standing erect ; the 

 hair on the upper side is whitish grey, on the un- 

 der side of the upper arm white and woolly ; on 

 the fore-arm yellowish, straight and close. The 

 hands are covered on the back with reddish-brown 

 hair, (as far as the last joint of the finger,) the 

 fore-fingers are particularly long and narrow ; but 

 the thumb is very short, as it reaches only to the 

 half of the middle of the hand. The two middle 

 fingers are much larger than the two others. The 

 nails of the fbre-fingers are long semi-cylindrical, 

 a little bent, which makes them have a resemblance 

 to claws, but round, and in the form of a nail at 

 the tip. Only the nail of the fore-finger is 

 obliquely blunted, which gives it a small point on 

 the inner side. The nails of the thumb are short, 

 raised, depressed and rounded off at the edge. 

 The skin of the bare palm of the hand is reddish. 

 The long white hairs of the hind feet have a woolly 

 appearance ; the hands on the back are here also 

 covered with reddish-brown hair ; they are longer 

 than the fore-hands, with which they agree in 

 every other particular. 



On both sides of the rump are two roundish 

 bare callous places, of a yellowish-brown colour. 



With respect to the form of the face, it has only 

 to be observed, that the zygoma projects very 

 much, while the nose is very little, and scarcely 



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