1904.] SPECIES OF SPOT- NOSED MONKEY. 435 



evanescent towai-ds the ear. The direction of the hairs of this 

 band follows its curvature. Beneath it the cheek is a dirty greyish 

 white, which gradually passes into the grizzly-yellow colour of the 

 sides of the neck. A scanty fringe of white hairs upon the ear. 

 Occipital area blackish. Nape of neck and shoulders speckled 

 yellow and black ; between the shoulders and the root of the tail 

 the coat is speckled black and lich coppery yellow. Ami exter- 

 nally speckled yellow and black, becoming blacker upon wrist and 

 hands and upon the posterior side below the elbow. Leg externally 

 speckled yellow and black to the upper side of the foot ; much 

 more sobre-tinted than the sacral region, but the tints of the two 

 areas blending imperceptibly, without any intervening line of 

 demarcation. The whole of the underside grey, whiter upon the 

 chin, where there are some black hairs, and upon the throat ; dusky 

 olive-grey upon the chest and belly, where the hairs are apically 

 annulate ; inner side of arms and legs also dark ashy grey. Upper 

 side of tail in its basal half speckled red and black, redder than 

 the sacral region, although the tints of the two ar-eas pass gradually 

 into one another ; posteriorly the upper side becomes gi'adually 

 yellower, then greyish black, with the terminal hairs quite black ; 

 underside of tail deep rusty red in its basal half, passing into ashy 

 grey posteriorly, a sharp line of demarcation between the tints of 

 the upper and undei' side. Some rusty -red hairs upon the perinteal 

 region and scrotum. 



Measux'ements of dried skin : — Prom crown of head to root of 

 tail 14| inches (363 mm.) ; length of tail 24| inches (613 mm.). 



Log. W. Africa : Benin. 



This species is based upon the skin of a young male specimen 

 with complete but unworn dentition, that was deposited in the 

 Gardens by Mrs. Pickering Phipps on July 12th, 1902, and died 

 on the 8th of August in the same year. 



I have much pleasure in dedicating the species to Dr. P. L. 

 Sclater, who, i-ecognising the importance of preserving material of 

 this genus, instructed Mr. Ockenden, the assistant to the Society's 

 Prosector, to skin examples of the genus Cercopithecus that died 

 in the Zoological Gardens. It was largely upon material thus 

 obtained that Dr. Sclater based his monograph of this genus 

 published in the 'Proceedings' for 1893. 



The form of the nose-spot points to affinity between this species 

 and C. cephits and C erythrotis. From 0. ce'phus it differs mainly 

 in the following characters: — (1) The hai^-iness of the nose; 

 (2) the absence of moustache-band ; (3) the pallid upper lip and 

 chin ; (4) the sinuous curva,ture of the black cheek-band ; (5) the 

 extension of the grey tint of the thi'oat up to the level of a line 

 joining the nostril and lower edge of ear ; (6) the presence of 

 a black occipital ba.nd as sti'ongiy defined as in C. petau7-ista ; 

 (7) the shortness of the white ear-fringe ; (8) the presence of red 

 hairs upon the sci-otum and all along the proximal portion of the 

 underside of the tail. 



It is nearer to C. erythrotis, but may be at once distinguished 

 Pkoc. Zool. Hoc— 1904, Yol. I. Xo. XXI^. 29 



