THE BABOONS. 26 I 



robust, the Haibs more slender. Face-swellings with only two 

 furrows ; crest and mane less prominent ; whiskers encroach- 

 ing on the face less than in tlie Mandrill ; beard slightly 

 shorter ; ears naked, pointed ; tail very short, erect, covered 

 with hair all round ; the hair round the head, shoulders and 

 sides of body, in a band below the chin, on the under surface 

 of the body, and the outer surface of the limbs, long and fine ; 

 muzzle long and truncated, the nostrils placed at its extremity, 

 and somewhat tubular ; fingers and toes naked. 



Face entirely black, without bright coloration ; general 

 colour of fur brown, approaching that of the Mandrill, but 

 washed with greenish on the upper parts, and the shoulders 

 darker. The hairs on the top of the head, on the back, and 

 wherever the greenish colour appears, are grey at the base, 

 alternating with black and yellow, thus producing the greenish 

 coloration ; a band from the throat to behind the ear greyish ; 

 the whole of the under surface and inner side of the limbs 

 greyish-white ; beard and whiskers greyish-white, washed with 

 greenish ; hands and feet reddish-purple ; callosities bright 

 scarlet. 



Young Male — Smaller; face-swellings less marked; fur and 

 beard more washed with greenish ; neck-band paler grey ; 

 whiskers paler ; callosities not scarlet. 



Female. — Like the young male, but the head shorter, and the 

 callosities scarlet; the head and shoulders less haired; the grey 

 neck-band absent ; fur in general paler ; the greenish hue less 

 marked except on the head and limbs ; the fur predominating 

 on the lower part of the back and flanks. 



Distribution. — The Drill is confined to West Africa. 



Habits. — Little is known of the habits of the Drill. It has 



