9° 
APES AND MONKEYS. 
The Ursine Colob (Colobus ursinus). 
Closely allied to the last species is the so-called ursine colob from Fernando Po, 
in which the mane is greyish, and not longer than the hair on the sides of the 
body. Yet another nearly related West African monkey is the Angola colob 
THE UHSINE COLOB AND BLACK COLOB (J liat. size). 
('Colobus angolensis), which differs from the king monkey in that the chest and 
two-thirds of the lower portion of the tail are black. 
The White-thighed Colob (Colobus villerosus). 
More markedly distinct than the preceding from the king monkey, is the 
white-thighed colob of Western Africa. This species is distinguished by the 
absence of a mane on the head and throat, although it has a small fringe round 
the face. The general colour is glossy black; but that of the forehead, of the 
frill round the face, and on the chin, is white. The tail is also white; but the 
