276 Lloyd's natural history. 



of the back lighter ; chin greyish-white ; the hind-Hmbs ex- 

 ternally washed wdth brownish-yellow ; the ujjper 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. babiiin. 



Distribution. — East Africa, from the Rovuma river to the Pan- 

 gani, and extending to the Victoria Nyanza. 



THE GELADA BABOONS. GENUS TIIEROPITHECUS. 

 TheroplthecuSj Is. Geuffr., Arch. IMus., ii., p. 576 (1841). 



This genus has been established for the reception of two 

 species which differ from the true Baboons {Cyiiocephalus) 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. 



I. THE GELADA BABOON. THEROPITHECUS GELADA. 



Macacus ge/ada, Riipp., Neue Wirbelth. Saugeth., p. 5, pi. 2 

 (1835); Schl., Mus. Pays Bas, vii., p. 107 (1876). 



Thei'OpitJieciis gelada^ Is. Geoffr., Arch. Mus., ii., p. 576 

 (1841). 



Theropithecus se?iex, Schimp. et Puch., Rev. et Mag. dc ZooL, 



1B57, P- 51- 

 Gdada riippelliiy Gray, Cat. Monkeys Brit. Mus., p. 33 (1S70); 

 Garrod, P. Z. S., 1879, p. 451. 



Characters.— Male.— Body large and massive; head oblong; 

 face produced, rounded, and nude below the superciliary ridge; 

 no3e long and depressed in its middle region, but elevated at 



