538 



The Descent of Man. 



Part II. 



mane, but slightly in the colour of the hair and of the naked 

 callosities. In the drill (C hucophceus) the females and young 

 are much paler-coloured, with less green, than the adult males. 

 No other member in the whole class of mammals is coloured in 

 so extraordinary a manner as the adult male mandrill (0. 

 mormon). The face at this age becomes of a fine blue, with the 

 ridge and tip of the nose of the most brilliant red. According to 

 some authors, the face is also marked with whitish stripes, and 



Fig. 69. Head of male Mandrill (from Gervais, ' Hist. Nat. des Mammiferes'). 



is shaded in parts with black, but the colours appear to be 

 variable. On the forehead there is a crest of hair, and on the 

 chin a yellow beard. " Toutes les parties superieures de leurs 

 " cuisses et le grand espace nu de leurs fesses sont egalement 

 * colores du rouge le plus vif, avcc un melange de bleu qui ne 



