336 Dr. T. Cantor on a species of Semnopithecus. 
busque ischiaticis nigris ; palpebris labiisque lacteis, uti halonibus 
circumdatis, tarsis palpebrarum nigris ; phalangibus digitorum 
primis membrana inter se junctis. 
Juvenis : Pallidior; crista occipitis cinerea, facie nigro-ceerulescenti. 
Neonatus : Nitide fulvus. : 
The colour of the face, ears, hands and feet, and of the ischiatic 
callosities is mtense shining black. The back and external sur- 
face of the extremities blackish or dark brownish ash, as well as 
the chest and the inner side of the extremities. The tail is cylin- 
drical, with a small terminal tuft of a lighter ash-colour. The 
skin is milky-white, and is left to view on the abdomen, which is 
thinly covered with ash-coloured hairs. The forehead is com- 
pletely hidden by hairs, so closely adpressed to the skull, that 
they appear as if they had been brushed backwards to the occiput, 
which is covered by a long crest of grayish hairs lying flat down 
the back, unless agitated by the movements of the head, when 
they may be said to “ stand on end.” The eyebrows are promi- 
nent, rendered more so by a ridge or bandeau of long, half-erect, 
diverging, shining black hairs. The eye is dark brown, nearly 
black, of great brilliancy, heightened by the milky-white colour 
of the eyelids, which forms a broad halo, bordered by the black 
tarsus and eyelashes. A similar broad halo is formed by the 
white lips and chin. These white markings, which are most de- 
veloped in the young, impart a very singular expression to the 
physiognomy. The nose is a little prominent. The nostrils open 
laterally, and the fleshy part between them is elevated. 
The lps and chin have a short grayish beard ; the cheeks are 
covered with long, backwards pointing whiskers, which nearly 
hide the black, rather large ears. The thumbs of the anterior 
extremities are very minute. The first phalanges of the four 
fingers are united by an interdigital membrane sufficiently lax 
to allow of the fingers being widely separated. This character 
exists not only in the different species of Gibbons and Monkeys 
enumerated by the author of ‘The Natural History of Monkeys, 
Opossums and Lemurs,’ but also in Semnopithecus cristatus, 
Horsfield (Simia cristata, Rafiles), Cercopithecus (Macacus) eyno- 
molgus, Ogilby, and Papio nemestrinus (Simia aygula), Ogilby. 
It is however difficult to recognise in preserved specimens, in 
which it becomes shriveled, and may therefore easily eseape ob- 
servation. The sexes of the present species appear not to differ 
in colour or size. The young ones are of the same but paler co- 
lours, and the face is blackish blue. Immediately after birth the 
colour is a shining fulvous. The fur consists of long soft hairs 
of a silky texture. This species is very common on the hills and 
forests of the Malayan Peninsula, Prince of Wales Island, and 
other neighbouring islands. The dimensions of the adult are :— 
