THE BABOONS. 261 
robust, the limbs more slender. Face-swellings with only two 
furrows ; crest and mane less prominent ; whiskers encroach- 
ing on the face less than in the 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 
