12 DESCRIPTIVK ACCOUNT OF 



SEMNOPITHFXUS FRONTATUS. 



Scmnopithccus frontntas, Muller, Tijdsch. voor Natuur. 

 Gesch., vol. v., pi. i. and ii. 1838, p. 136. 



Form slender; the face broad across the eyes, but com- 

 pressed from above downwards; the trunk of the body dark 

 yellowish brown, with a imgc of red on the flanks in some 

 individuals, but. passing into ilark brown and then into black 

 on the greater jmrt of the outside of the limbs, on the back 

 part of the thighs and on the root of the tail; the remainder 

 of the tail being greyish or yellowish brown and tufted. The 

 neck and head are yellow-brown, but the latter colour passes 

 into black on the haired portion of the forehead, sides of the 

 head, and on the crest. The under parts are pale reddish, 

 liglitei' on the throat, extending as a narrow band down the 

 inside of the forelimbs to near the wrist, and also on the hind 

 limbs, but stopping short of the ankle. A bold, triangular 

 area between the eyebiows, ascenchng to the middle of the 

 forehead and in reality occupying the glabella, reaching at its 

 ujiper end that part where the radiation of the hair of the 

 other species usually takes place of a milky-white colour anil 

 wrinkled; the rest of the face being deep black, except the 

 lower lip and a narrijw line along the upper lip which are 

 flesh-coloured and sparsely co\'c;'ed with yellowish brown liairs. 

 Along the upper margin of the bare area are arranged long 

 and black hairs, which being directed downwards and outwards 

 commiiigle with the long bristly, black eyebrows, and reach as 

 far back as tlie ears, a.^ a marked lateral tutt or pencd, the 

 hair on the siile of the head abo\'e these lengthened liairs being 

 short. The hairs of the cheeks Ircjm near tbe no^e along ibe 

 malar regions to the anterior root ol the zygomatic arch are 

 long and black, increasing in length on tlie hindmost pail of 

 the cheek to such a degiee that they depend nearly to the 

 shoulder. The c;est is erect, high and compressed, (occupying 

 the middle line of the head like the ridge of a helmet, over- 

 reaching the foi'chead, where it is slightly contracted, and 

 reaching backwards to the occiput, where it decieases and 

 mingles with hairs on the upper part of the neck. 



The young do not appear to differ much in colour from 

 the atlults. 



ft. in. 



Length of body to root of tail i 10. 



Length of tail 2 4. 



The skull of this remarkable animal is distinguished from 

 the skulls of the other Scmnopithcci by its highly arched, but 

 rather narrow, retreating forehead ; by the great breadth of 

 its orbits, the little naked prominence or arching of the inter- 

 orbital space compared with that of the other crested species 



