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This Elgon Monkey does not resemble its nearest geographical 

 neighboLir C leucampyx Ncumanni Matschie, which is speckled 

 with buff. From Carruthersi to which it bears most reseniblance it 

 difFers, as already is mentioned, by its extremelv rich grey wool, 

 the black hind legs and speckled tail. 



The strong development oi the wool of this monkev is, of course, 

 an adaptation to the harsh climate on Elgon and has its analogy 

 with regard to other manimals froni that mountain. 



Dr. Bayer's discovery of this monkey on Elgon is very interes- 

 ting as it extends towards north east the known area of distribution 

 of still another member of the « Westafrican » forest fauna into 

 East Africa thus giving a further proof that this once occupied a 

 much greater territorv than now. 



Cercopithecus opisthostictus Sclater. 



I spécimen (n" 1252) from Katanga (Sharpe). 



As the type of the species was from the neighbourhood oi Lake 

 Mweru, and another spécimen was with certainty collected in the 

 Kundelungu mountains in Katanga it appears bv this addition to be 

 proved that this province is the home of this hitherto very rare 

 monkey. It is evidently the représentative of the leuca}npyx-'g\o^^^^ 

 in Katanga. 



By its white upper lip C. opisthostictus to a certain extent may 

 be said to form a Connecting link to C. nictitans L. 



Cercopithecus nictitans L. 



There is a skin of 6'. nictitans Lin. (n" 1500) which has conie 

 to the Muséum from the Zoological Garden of Antwerp. This 

 spécimen is onlv said to be from « Congo ». It is of interest 

 because its tail is very light-coloured, much mixed with white so 

 that the gênerai appearance of this organ is speckled silvery grey. 

 This may be an individual variation, but it may also indicate, that 

 somewhere this species has developed a local race. Perhaps this 



