1844.] Notices of various Mammalia. 477 



are known to present so very prominent a muzzle, while, on the other 

 hand, the lowest of all the Simiado?, or the American Marmozets, 

 have the same so inconsiderably developed ; and it would seem that 

 some trivial resemblance which the Semnotes bear to the Gibbons is 

 now the chief inducement that occasions the former to be still placed 

 next to the group of tail-less Apes, and thus to precede the third great 

 division of old world Monkeys and Baboons, which is characterized 

 by possessing cheek-pouches. But this third division unquestionably 

 presents a nearer structural approach to the first than does the second ; 

 and, so far as I have observed, the intellect is also decidedly of a 

 superior grade. I have next to describe an apparently new species of 

 the African genus Cercopithecus. 



Cercopithecus chrysurus, Nobis. This belongs to the particular 

 minor group exemplified by C. sabceus, and would seem to be nearly 

 allied both to that species and to the C. tantalus, Ogilby, P. Z. S. 

 1841, p. 33, the tail of which is stated in the Latin diagnosis to be 

 yellow at tip, while in the more detailed vernacular description this 

 is said to be " brown at the base, light grey at the tip." In the 

 species now described, the terminal third of the tail is bright yellowish- 

 ferruginous, as I believe in C. sabceus. The specimen is a male, and 

 measures about nineteen inches from forehead to base of tail, the tail 

 about twenty-four inches ; from elbow to tip of hand nine inches, 

 knee to heel seven and a quarter, and foot five inches. Colour 

 grizzled yellowish-brown, the hair fine and soft at base, with the ter- 

 minal half comparatively coarse and rigid, and broadly annulated 

 first with black, then fulvous, and finally tipped with black ; for 

 the most part about two inches and a quarter long, but exceeding 

 three inches on the sides towards the flanks: the whiskers, with the 

 entire under-parts and inside of the limbs, are dingy yellowish- 

 white: the fore-arm and leg greyer, or less yellowish than the 

 parts above ; and the hands and feet infuscated. Face almost 

 naked, having only a few scattered hairs ; but a narrow supercilium 

 of long black hairs across the brow. The upper surface of the tail is 

 rather darker than the back for the first two-thirds of its length, 

 and then passes into bright yellowish-ferruginous, which on the under 

 surface of the tail is continued nearly to its base, weakening however 

 in intensity; the extreme tip of the tail is wanting in the specimen. 



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