Species and Subsjtecies of Monkeys. 240 



not Haring outward at bottom as in the skull of the allied 

 species; rostrum broader posteriorly; palate of equal width 

 tlacnij^liout its li-ngth ; orbital ridgo straight, not depressed 

 in centre ; septum narrower; orbits more circular. 



Culoiir. — AduU male. Face flesh-colour; callosities red; 

 forehead covered with black hairs banded with white, this 

 colour rising in the shape of a pyramid and coming to a 

 point on the crown of the head ; hairs on cheeks and aides 

 of head long, stitl", very dense, rising upwards in enormous 

 tufts above the head, yellowish white at base, grading into 

 l)uiry at tips; Innd-neck and mantle pale reddish brown, 

 with a band of white, succeeded by a subterminal one of 

 l)lack, and tip silvery white; towards tlie lower i)ack the 

 colour darkens into cinnamon aunulated with bands, and 

 with tips of a paler cinnamon ; upper part of rump ochra- 

 ecous butf, paler than the mantle; lower rump and base of 

 tail silvery white; hairs on sides of lower jaw long, dense, 

 yellowish white ; throat more sparsely covered with hairs of 

 same colour; chest dark grey, hairs banded with black and 

 white and tipped with white ; abdomen ochraceous ; arms 

 and hands like tbreliead, grizzled, hairs banded witli black 

 and white, and grizzled reddish, hairs banded with reddish 

 brown and white ; tail grizzled russet and white, tuft russet. 



Measurements. Total length 1322 mm.; tail 572; foot 

 188 ; ear 59 (collector). Skull : total length 180-4 ; 

 occi])ito-nasal length 147*9 ; hensel 125*7 ; intertemporal 

 width oGG; width of brain-case 80; length of rostrum 91*2, 

 width of rostrum posteriorly 46*6; zygomatic width 119"7 ; 

 palatal length 76*8 ; length of nasals 52*1 ; length of upper 

 molar series 44*6 ; size of last upper molar, crown, 10 x 8*5 ; 

 length of mandible 136*1 ; length of lower molar series 57 ; 

 size of last molar, crown, 13*5 x 8*5. 



Tijjje. Adult male, in British Museum, presented by 

 Dr. U. Drake- Brock man. No. 9. 6. 1. 1. 



The type is a very tine specimen of an adult male. As 

 shown by the description, it differs in many ways from the 

 Abyssinian Hamadryas, and also from the Arabian, as the 

 latter seem to be nearer the Abyssinian species than to 

 the present one. The pale reddish mantle and parti-coloured 

 rump of ochraceous buff and silvery white causes it to be 

 very conspicuously dittVrcnt when placed among other 

 examples of Hamadryas baboons. The type was procured 

 by Dr. D. Drake-Broekman, after whom I have great 

 pleasure in naming it. 



