156 • ANTELOPES 



THE CHESTNUT DLHKER 

 {Cephalop/ms castaneiis) 



The Cameroons representative of the bay duiker was originally 

 described by Mr, O. Thomas on p. 421 of the Zoological Society's 

 Proceedings for 1892 as a subspecies, but was raised to specific rank 

 in his description of Weyns's duiker, to which reference has been 

 already made (p. 152). 



This antelope is slightly superior in size to the last, and apparently 

 has rather larger ears. In colour it is uniformly deep chestnut, with 

 the exception of a black dorsal stripe, and the brown lower portion 

 of the legs ; the chestnut eyebrow-stripe being less distinct than in 

 dorsalis, and the general colour of the head darker and duller than in 

 that species. Moreover, the skull has the slender elongate muzzle 

 characteristic of the genus generally, whereas that of the bay duiker 

 has a short conical muzzle. There is likewise a difference in the form 

 of the auditory bladder, or bulla, at the base of the hind part of the 

 skull. 



THE WHITE-LIPPED DUIKER 



{CepJialopJms leucochilns) 



Under this name Dr. F. A. Jentink has described {Notes Leyden 

 Museum, vol. xxiii. p. 21, 1901) a duiker from Loango, Angola, 

 which is stated to come very close to Cephalophus dorsalis, but to be 

 larger, heavier, and darker-coloured. It is further distinguished by the 

 higher portion of the upper lips being white, like the chin ; and there 

 is also a large white spot above each eye, terminating in a white line 

 tending towards the upper part of the nose. 



OGILBY'S DUIKER 



( Cephalophus ogilhyi) 



This species, which also belongs to the red group, is a native of 

 Fernando Po, although there is a possibility that it may also occur 

 on the mainland. Of medium size, it has the general colour bright 



