160 ON A NEW CEBCOPITHEOUS MONKEY, [Mar. 3, 



forward the opinion that the species must be regarded as an 

 abei-rant type of the Leucampy x-^vow^ (p. 685). The correctness 

 of this view is shown by the discovery of C. ezrce, which may be 

 said to occupy an intermediate position between C. neglectus, on 

 the one hand, and the Abyssmian Monkey described as C. houtoit7-- 

 linii, which I consider to be a subspecies of C. leucampyx, on the 

 other. 



The only very young example of C. neglectus that I have seen — 

 namely, one from the Cameroons — resembled the adults in colour. 



It is to be regretted that the exact locality of C. ezrce is at 

 present unknown, but since it came to Hull in company with an 

 example of G. ascanius schnidti, its geographical area is probably 

 the Upper Congo. The species is so distinct from even its 

 nearest allies that there can be no difficulty, I think, in its 

 identification when other specimens come to hand to be named. 



In the P. Z. S. 1907, p. 739, I described a new species of 

 Cercopiihec'us from the Congo under the name nigroviridis. Since 

 the figure of the head of this species i-epresented on pi. xlii. 

 fig. 5, and taken from a dried skin, is inaccurate in two particulars, 

 namely, in showing the chin black and in omitting the naiTOW 

 black streak running back from the corner of the eye, I take this 

 opportunity of figuring the whole animal from an example now 

 living in the Gardens. 



I also figure the type of that remarkable new species said to 

 have come from the Ituri Forest and described by myself in Ann. 

 Mag. Nat. Hist. (7) xx. pp. 521-522, 1907, as Cercopithems 

 hcmilyni. The animal is still living in the Gardens, and owing to 

 change of coat and improvement in condition has altered some- 

 what in colour. The brownish-yellow speckling of the hairs has 

 changed to greenish-yellow. There is no pale brow-band except 

 such as is indicated by the gi^ey bases of the antei'ior hairs. The 

 arms are for the most pai-t black except for a speckled area below 

 the elbow on the outer side. The wrist and ankles, like the hands 

 and feet, are black. 



EXPLANATION OF PLATE X. 



Eig'. 1. Cercopitheeus niffroviridis Poc. 



2. CercopitJiecus ezree, sp. ii. 



3. CercopitJiecus hamlyni Poc. 



(The attitudes are taken from photographs of living animals.) 



