ERYTHROCEBUS IS 



line from eye to ear; crown of head fox red; rest of head and hind 

 neck tawny ochraceous, hairs with a subterminal yellow band and 

 black tips; rest of dorsal region dark ochraceous rufous becoming a 

 bright bay on flanks and rump ; hairs tipped with golden, only 

 occasionally one with a black tip ; shoulders covered with long black 

 hairs annulated with cream color; side of face white; whiskers and 

 sides of neck white tinged with yellow ; inner and outer side of arms 

 white, hands grayish white; upper parts of thighs around hips bright 

 bay like rump; rest of thighs and legs, inner and outer sides, white; 

 feet yellowish white ; chin, throat and chest white ; middle of abdomen 

 pale yellow ; tail bay above, beneath yellowish white. Ex type British 

 Museum. 



Measurements. Total length, 1,070; tail, imperfect, 430; foot, 

 140, (flat skin). Skull: total length, 135; occipito-nasal length, 114; 

 intertemporal width, 47.3 ; Hensel, 94.7 ; zygomatic width, 80 ; breadth 

 of braincase, 59.3 ; median length of nasals, 25.2 ; palatal length, 47.7 ; 

 length of upper molar series, 29.7 ; length of upper canines, 34.7 ; length 

 of mandible, 81.8: length of lower molar series, 36.6. Ex type British 

 Museum. 



The skull is long and narrow, the length of cranium from the 

 anterior edge of orbital ridge to occiput being nearly twice the breadth ; 

 rostrum rather long and nearly of equal width, being but slightly 

 broader posteriorly; narial opening broad for the length; no de- 

 pression behind orbital ridges, the superior outline being nearly level 

 beginning to descend about the middle of the parietal ; palate long, 

 deep and narrow ; canines very long, curved and pointed. 



This form is distinguished from E. polioph^us by having white 

 forearms, no black line from eye to ear, thighs white not reddish, much 

 deeper color of the upper parts of the body, and the rump unspeckled. 

 The skull is much longer and narrower, the middle molar larger, the 

 last molar and the second premolar smaller than the corresponding 

 teeth in E. polioph^us. The exact locality of the unique type which 

 was received by the British Museum from Captain Flower, Director of 

 the Zoological Gardens in Ghiza, Egypt, is unknown, the only state- 

 ment given is that it was brought from the Egyptian Soudan. 



Eeytheocebus SANNio (Thomas). 



Cercopithecus sannio Thos., Ann. Mag. Nat. Hist., 7th Ser., XVII, 

 1906, p. 173; Pocock, Proc. Zool. Soc. Lond., II, 1907, p. 

 745. 



