11. mrorrrHEcts. 19 
Var. 3. Pornaandtit. Like var. 2, but feet and tail blacker ; no red on 
the nape. 
Beye aaa Waterhouse, P. Z. 8. 1838, p. 57! Martin, Quad. i. 
Pp. ! 
Hab. West Africa: Gambia, Rendall. 
These species were described from flat furriers’ skins ; but the large 
series of skins and more perfect specimens show that they are only 
varieties, in intensity of colour, of the same species—the Bay 
Monkey of Pennant. The thumb varies in development ; sometimes 
it has a claw. 
6. Colobus cristatus. B.M. 
Fur short, yellow brown; front part of body, shoulders, and 
outside of the fore legs greyer; throat, chest, belly, inside of limbs 
and feet greyish white. Hair of crown short, reflexed, with two 
streaks in front, and with a narrow, erect, longitudinal crest behind. 
Colobus cristatus, Gray, Ann. §& Mag. N. H. 1866! 
Hab. West Africa, 
See Colobus verus, Van Beneden, Bull. Acad. Brux. v. p. 811, 
1838. Head, neck, back, and base of the tail olive-brown, 
hairs all finely ringed with black; nape, and above and below 
the callosities, dark brown ; tail long, grey, darker at the tip. 
Body and limbs strong ; index finger six or eight lines shorter 
than the middle one. Hab. Africa. Mus. Paris. 
10. GUEREZA. 
Nostrils rather wide apart. Back with a line of long pendulous 
hair, forming a kind of mantle. Thumb rudimentary. Tail-end 
tufted. Hab. Africa. 
Guereza Riippellii. The Guereza. B. M. 
Black ; end of tail, hair round the face, and of the mantle white. 
Colobus guereza, Riippell, Fauna Abyss. t. 1! 
Hab. Abyssinia, Riippell; West Africa, Thompson. 
Tribe IV. CERCOPITHECINA. 
Head round or oblong. Nostrils on the slope of the face, separated 
by a narrow septum. Hands and feet short, broad. Thumb large. 
Stomach simple. Hab. Africa. 
A. Head rounded, Face short, Last lower grinder with three or four 
tubercles. 
11. MIOPITHECUS. 
Head globular. Whiskers straight, rather rigid, bent downwards. 
Body und limbs slender. Hands long; fingers united at the base ; 
c2 
