Wood-Antelope. 



ANTELOPES. 311 



Two species of this genus from West Africa also call for mention 

 on account of their great superiority in size over its other representa- 

 tives. One of these is the wood-antelope (C. sylvicultor) of Sierra Leone and the 

 Gabun, and the other the black wood-antelope (C. jentinki) from Liberia. The 

 former stands about 2 feet 10J inches in height, and is of a blackish colour, with 

 the hinder part of the middle of the back marked by a yellowish white line. The 

 second species is rather smaller, and is of a greyish colour on the body, with the 

 head and neck black, and the legs, lips, and inner sides of the ears whitish. The 

 tuft of hair on the head is small and inconspicuous. Altogether nineteen species of 

 these antelopes are recognised by Mr. O. Thomas. 



FOUR-HORNED ANTELOPE. 

 Genus Tetraceros. 



The chousingha, or four -horned antelope (T. quadricornis) is the Indian 

 representative of the duikerboks, and differs from all other living Ruminants in 



MALE AND FEMALE FOUR-HORNED ANTELOPES (& nat. size). 



that the male generally has two pairs of horns, of which the larger are placed as in 

 the duikers, while the smaller pair are situated immediately over the eyes. The 

 gland below the eye has nearly the same elongated aperture as in the duikers ; 

 but there is no tuft of hair on the crown of the head, and the upper molar teeth 



