376 llovd's natural history. 



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

 ternally 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. bahuin. 



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

 gani, and extending to the Victoria Nyanza. 



THE GELADA BABOONS. GENUS THEROPITHECUS* 

 Theropitheais, Is. Geoffr., Arch. INIus., ii., p. 576 (1841). 



This genus has been estabhshed for the reception of two 

 speoies 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. 



I. THE GELADA BABOON. THEROPITHECUS GELADA. 



Macacus gelada, Riipp., Neue Wirbelth. Saugeth., p. 5, pi. 2 

 (1835); Schl., Mus. Pays Bas, vii., p. T07 (1876). 



Theropithecus geiada, Is. Geoffr., Arch. Mus., ii., p. 576 

 (1841). 



Theropithecus senex, Schimp. et Puch., Rev. et Mag. de Zool., 



1S57, P- 51- 

 Gelada riippellii^ Gray, Cat. Monkeys Brit, Mus., p. -^-^ (1870); 

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



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

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

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



