326 MR. R. LYDEKKER ON GUEREZA MONKEYS. [ Nov. 28, 
expand into a brush. A further development is exhibited by the 
typical form of Colobus palliatus (text-fig. 55), from British Kast 
Africa and the neighbouring districts, in which the two lateral 
white face-tufts are connected by a white band across the brow, 
while the shoulder-tufts are of considerably larger size, a small 
whitish patch beneath the tail occupies the perineal region, and 
the tail has its terminal third whitish, the middle third grey, and 
the remainder black. A nearly allied type is found in the form 
of the Mountain Guereza (C. ruwenzorii), of the Ruwenzori dis- 
trict, in which the white perineal patch has assumed much larger 
proportions, although the extreme tip of the tail is alone greyish ; 
the latter feature placing the species, so far as the colouring of 
this appendage is concerned, next to the Black Guereza. 
Text-fig. 55. 
Mantled Guereza (Colobus palliatus). 
From the three foregoing black-and-white forms there is an easy 
transition to Sharpe’s Guereza (C. sharpei), of Nyasaland, in which, 
as shown in text-fig. 56, p. 327, the white brow-band, face-, throat-, 
and shoulder-tufts have become very long and pronounced, the 
hairs of the last hanging down the outer side of the fore-limbs. 
Moreover, the white terminal third of the tail has developed a dis- 
tinct tuft, not dissimilar in relative size and form to that of a 
lion’s tail. A step still further in advance is taken by the typical 
Guereza (C’. guereza) of Abyssinia and North-east Africa generally. 
In this handsome monkey the white shoulder-tufts extend back- 
wards to form a long mantle, falling down each side of the body 
