1894.] DR. A. B. METER ON AN AFRICAN MONKEY. 83 



3. Remarks on au African Monkey, Cercopithecus loolfi. 

 By A. B. Meyer. 



[Keceived November 21, 1893.] 



(Plate VII.) 



In 'Notes from the Leyden Museum' (vol. xiii. pp. 63-64, 

 December 1890) I gave a preliminary description of this new 

 Monkey from Inner Africa (though the exact locality is not known), 

 after a living specimen in the Dresden Zoological Garden. At 

 the same time I expressed my intention of giving fuller particulars 

 after the animal's death, since it is impossible to be perfect in 

 details win n noting down the characters of a living Monkey 

 constantly leaping from one end of its cage to the other. The 

 animal hav.ng died in October 1891, I now offer the subjoined 

 description, illustrated by a figure, of this remarkably fine species, 

 and add som 3 notes on its skeleton. In the valuable and complete 

 list of the ge us Gercopiihecus recently published by Dr. P. L. Sclater 

 (P. Z, S. 1893, pp. 243 & 441), the 31 kuown species are divided 

 into 6 sections, and if one does not wish to create a new section 

 for C. ivolfi, it could be placed in Section C (Erythronoti : above 

 rufous, beneath white), or in Section E (Auriculati: ears with long 

 tufts), though it does not exactly agree with either. 



The following is a description of the specimen : — General colour 

 of the upper surface dark slate-grey, passing into blue-grey on the 

 sides, each hair with two or three pale rings and tipped with black ; 

 the hair-rings from the crown downwards form a dorsal stripe 

 4 cm. broad, tapering off to a point towards the tail, olive-yellowish 

 from the crown to the middle of the back, most vivid on the crown, 

 brown-yellow towards the tail; the hair-rings on the sides are 

 pearl-grey, on the basal half of tail above ash-grey, the tips of 

 the hairs black, on basal half of tail below whitish ; the lengthened 

 hairs of the sides of the body orange-yellow ; nose and bare skin 

 of face blackish grey; upper lip as far as nose and bare parts of 

 under-lip flesh-colour ; iris red-brown ; the diadem-like stripe 

 across forehead, extending more narrowly to the ears, yellowish 

 white, each hair black at the tip ; eyebrows black ; the hairs of 

 the ears bright red-brown ; temples and space in front of ears 

 black, the loug hair i of the whiskers washed with the same colour ; 

 the hair -rings of the whiskers, which tend to a lemon-yellow colour, 

 are very broad in f i ont, so that these hairs appear almost uniform 

 yellow; chin, sides of neck, inner sides of arms, breast, belly, and 

 inner sides of legs white, the hairs of the belly with faint orange- 

 yellow tips ; shoulders and upper arms black, with pearl-grey 

 hair-rings; outer sic 1 e of lower arms uniform glossy deep black, 

 between this and th i white iuner side a narrow ochre-coloured 

 stripe running down o the underside of the hands ; hairs on hands 

 and feet above black becoming thinner on the fingers ; skin of 

 hands and feet blackit i grey; outer side of legs bright red-brown, 



