Chapter XI: Langheld's Baboon. Papio Langheldi

_Cynocephalus langheldi_, Matschie, S. B. Ges. Nat. Freunde, Berlin,
1892, p. 233.

CHARACTERS.--Hair of back long and coarse; that of the hinder quarters shorter. Length of body, 29½ inches; of tail, 18 inches.

General colour, dirty olive-grey--the hairs brown at the base, then yellowish-grey, ringed further up with black and yellowish-grey and tipped with black; the long and coarse hair {276}of the back lighter; chin greyish-white; the hind-limbs externally washed with brownish-yellow; the upper side of the hands and feet olive-yellow; tail brownish-grey; under side of body and inside of limbs silvery-grey.

The bright olive-grey of the upper side and the silver-grey under side distinguish this species from all others; it is most nearly related to _C. babuin_.

DISTRIBUTION.--East Africa, from the Rovuma river to the Pangani, and extending to the Victoria Nyanza.

THE GELADA BABOONS. GENUS THEROPITHECUS.

_Theropithecus_, Is. Geoffr., Arch. Mus., ii., p. 576 (1841).

This genus has been established for the reception of two species which differ from the true Baboons (_Cynocephalus_) in having the nostrils placed on the side of the snout, instead of being terminal and opening, Dog-like, on the blunt face of the truncated nose.