38 MAMMALS

prettiest being C. collar¢s, with the white collar. . The
mangabeys all come from West Africa; they are
the most grimaceful of monkeys, and have a curious
habit of turning up their tail as they walk, as if they
were endeavouring to tickle their nose with it.

The macaques are Asiatic. They are heavier in
build than the mangabeys, and have much more pro-
jecting faces, though among them the nose is never

    

  

THE WHITE-COLLARED MANGABEY

as far forward as the mouth. Some of them have
long tails, some of them short tails; one of them has
no tail at all, the tail, for sorting purposes, being now
treated as a ‘negligeable quantity.’ They all re-
semble each other in gestures and voice, and appa-
rently have a rudimentary language. According to
Colonel Tickell, anger is generally silent amongst
them, ‘or, at most, expressed by a low hoarse ew, not