1880.] 



MR. W. A. FORBliS ON THE UAKARI MONKEYS. 629 



animal flush up, as it were, in a moment a brilliant red all over the 

 naked parts of its face, and as soon become pale again when the 

 disturbing cause had subsided. After death the brilliant red colour 

 was confined to the region of the nasal openings and the interval 

 between them and the upper lip ^ The ej-elashes are represented 

 only by very fine silky minute hairs. The irides were light hazel- 

 brown, the sclerotic white. These points may be well seen in the 

 accompanying figure of the head (Plate LXIl.), of the natural size, 

 drawn soon after death by Mr. Smit ". The ears are of a somewhat 

 squared shape — much move so than in a specimen of Pithecia 

 satanas I was able soon afterwards to examine in the flesh — with the 

 angles rounded off. There is no lobule ; and both tragus and anti- 

 tragus are little developed. The helix has a small recurved flap 

 above, lying over the top of the helical fossa. They are quite 

 naked. At a point about corresponding with the top of the occiput 

 there is a parting of the hairs of the head, these radiating forwards, 

 outwards, and backwards from this point — the long red hair which 

 covers the sides of the head, passes over and beliind the ears, 

 passing outwards and then forwards, whilst the hairs of the back of 

 the head and neck pass backwards. The short silky grey and white 

 hairs covering the top of the head pass directly forwards. These are 

 very fine, and closely appressed to the scalp ; white for the greater part 

 of their length, they become black at the tips ; towards the sides and 

 front of the scalp they become tinged with reddish, so gradually 

 passing into the red of the sides of the head. This reddish tinge is 

 produced by the presence on these hairs of a rufous zone between 

 the white of their bases and the black of the tips ; a few, however, 

 are black throughout. These short hairs almost entirely disappear 

 a little behind the long superciliary hairs. The hairy covering of 

 the scalp ceases along a line between the top of the ears and the top 

 of the orbits. Below this limit the sides of the head are only very 

 sparsely covered with rather long, fine, forvvardly-directed hairs, 

 which are mostly rufous, paler at the base, and black-tipped ; here, 

 as elsewhere, however, some are quite black. Tlie skin round the 

 angles of the mouth is, for a small area, almost completely naked. 

 The posterior border of the lower jaw, on the contrary, as well as 

 the sides of the throat, are covered by long rich chestnut largely 

 black-tipped hairs, which are directed forwards ; these run as far 

 as the symphysis, and form a sort of whiskers. The hairs of the 

 back of the head, nape, and neck are paler in colour than those 

 on the rest of the body, being pale fulvous, many having, however, 

 black tips, whilst a few are entirely of that colour. The rest of the 

 body is covered with very long, fine, backvvardly-directed hairs of 

 a bright rich chestnut colour, as usual more or less black-tipped, 

 with a sprinkling of quite black ones. 



In general colour and texture the coat of the Uakari greatly 



1 Cf. Bates, • Xiituralisl on the Auiazons,' ii. p. 310. 



- Ill this figure the extent of tho red C(jlour of the face has been restored, 

 partly from memory and notes taken from the living animal, and partly from 

 the sketch made by Mr. Wolf. 



