THE SPIDER -MONKEYS. 237 
the body, that on the forehead erect and directed backwards, 
that on the top of the head long, projecting forward. Face 
and muzzle} except a black line from the side of the nose and 
inner corners of the eyes to the cheeks, flesh-coloured. General 
colour uniforn) black, but the whole under surface deep bright 
rufous, this colour extending but slightly on to the inner 
surface of the limbs. Thumbs entirely wanting. 
Differs from A. geoffroyt by its flesh-coloured face and by 
the two colours of the upper and under sides being clearly 
defined. Length of body, 12 inches ; of tail, 1544 inches. 
Distribution.— This species was first discovered on the Atrato 
river, in Northern Colombia, and has since been found in 
Panama. 
Habits. —The Red-bellied Spider-Monkey is very rare, only 
one or two specimens having yet been obtained. Nothing is, 
therefore, known of its habits. 
IV. THE RED-FACED SPIDER-MONKEY. ATELES PANISCUS. 
Simia paniscus, Linn., Syst. Nat., i., p. 27 (1766). 
Ateles pentadactylus, Geoff., Ann. Mus., vii., p. 269 (1806) ; 
Schl., Mus. Pays Bas, vii., p. 172 (1876, in part). 
Ateles paniscus, Geoff., Ann. Mus., vii., p. 270 (1806) ; Gray, 
Cat. Monkeys Brit. Mus., p. 42 (1870); Schl., Mus. Pays 
Bas, vil.,.p. 169 (1876, part.): 
Le coaita, F. Cuy. et Geoffr., Nat. Hist. Mamm., liv., v. (Avril, 
1819). 
Sapajou paniscus, Slack, Proc. Acad. Nat. Sci. Philad., p. 509 
(1862). 
Characters.—Very similar to A. aver in its coarse and en- 
tirely black fur, but differing in the naked and flesh-coloured 
