EASTERN ETHIOPIA 
XI 
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fingered, but the thumb is sometimes indicated in adult 
monkeys by a nail. In one species, the red Colobus, 
which lives in the forests of Western Toro to the east 
of Ruwenzori, the thumb is present in the young 
monkeys, but as they become adult it dwindles till only 
a small nail is left: in very old animals even this 
disappears. 
The Guereza or Colobus Monkey. 
This conspicuously coloured animal is seen with difficulty when 
sitting on a tree-top whose branches are covered with the long 
beard moss. When the monkey jumps from one tree to 
another the long hair spreads out, and it looks like moss 
suddenly come to life. 
Colobus monkeys are peculiar to Africa. The 
common species are remarkable for their peculiar 
coloration and the length of their hair. The long 
white hair which looks like a mane on the sides of the 
body and the long tail with the fluffy white plume at 
its end are very striking. Both sexes have stiff white 
