SEMNOPITHECUS. 43 



SemnopitJiecus larvaiuSj Fisclier, Syn. Mam. 18^9, p. 16; Martin^ Nat. Hist. Quadrumana^ 1841, 

 p. 453, figs. 279, 280, 281, 282; Gervais, Hist. Nat. des Mammif. 1854, p. 58, head juv., 

 fig. adult. 



Simia nasalis, Martin, Proc. Zool. Soc. 1837, p. 70. 



Bhi/nochopithecus larvatus, Dahlbom, Stud. Zool. Fam. Reg. An. 1856, p. 93, pi. iv. 



The upper surface of the head, neck, back and flanks dark red-brown, 

 passing into greyish yellow on the crupper, tail, and limbs. A yellow stripe on 

 the sboulder. The hair on the sides of the face, neck, and shoulder is long and 

 of a yellowish tint variegated with reddish brown, and the chin is well bearded. 

 The under parts are yellowish white, and the tail is tufted. The face is a dirty 

 yellow merging with the white around the lips. The under surfaces of the 

 extremities are blackish, and the ears are of the same colour, and small. Nose 

 produced into a proboscis with large nostrils opening downwards and separated 

 from each other by a septun, but only developed in its characteristic form at a very 

 advanced age in both sexes, being much shorter in the young and turned upwards 

 (^S'. recurvus, Vig. and Horsfd.). The eyes are rather widely apart ; the neck short, 

 and the throat rather swollen from the presence of a laryngeal sack. 



The colours of both sexes are the same, but the female is smaller than the 

 male. Its colour as it advances in age is the subject of considerable change. 

 In early youth, the mouth and the area around the eyes are bluish, and the 

 cheeks are curiously wrinkled, and the rest of the face is sullied brownish white, 

 and the ear flesh-coloured, but intensely black around the margin. The hands are 

 black ; and the head with the exception of the crown, the neck, the upper part of 

 the chest, and the front of the upper arm, are dark red-brown, the rest of the 

 pelage being sullied, pale-yellowish brown. Through a series of changes during 

 which the red-brown of the upper parts first increases in strength and the grey- 

 brown of the hips and upper side of the tail change to yellowish white, the adult 

 pelage is reached. 



Length o£ adult, muzzle to base of tail . 



„ of tail ....... 



Ft. 



In. 



2 



5 



2 



2 



This peculiar form, which has all the structural characters of Semnopithecus, 

 appears to be restricted to the Island of Borneo. 



SEMNOPITHECUS (nasalis) eoxellan^, A. M.-Edwards. 



Semnopithecus roxellanm, A. M.-Edwards, Comptes Rendus, 14 Fev. 1870, vol. Lxx. 1870, p. 341. 

 Rhinopiihecus^ roscellana, A. M.-Edwards, Rech. des Mammif. 1868-74, p. 233, pis. xxxvi. et 

 xxxvii; Blyth, Journ. As. Soc. Beng. vol. xliv. 1875, ex. qo. p. 11. 



Pace much depressed in the nasal portion, nearly nude and turquoise-green. 

 Nose much upturned and terminating in a point shaped as two follicles. Pace 



^ In 1856 the genus Rhynocho;pithecus was created by Dalilbom for 8, {nasalis) larvatus. 



