DUIKERS AND SMALL ANTELOPES 537 



Jackson, who appears to be the only sportsman who has met 

 with this rare Httle antelope, records it from the forests 

 near Witu. Robin Kemp, the mammal collector for the 

 British Museum, has collected a specimen recently in the 

 Shimba Hills. It will doubtless be found in all the larger 

 forest area of the coast district upon careful investigation. 



Bush Duikers 



Sylvicapra 



Sylvicapra Ogilby, 1863, Proc. Zool. Soc, p. 138; type Cephalophus grimmia. 



The bush or common duikers are usually placed in the 

 genus Cephalophus together with the true forest duikers. 

 They have, however, several points of difference from the 

 latter, and there is less liability of confusion if they are 

 treated as a separate genus, Sylvicapra. The horns differ 

 from those of the forest duikers in direction, slanting up- 

 ward at an angle to the dorsal profile of the skull. In 

 shape they differ somewhat, being long, slender, and cir- 

 cular in outline at the base, with no approach to the trian- 

 gular flattened horns of the forest duikers. The female is 

 distinguishable from the forest duikers by the absence of 

 horns. The skull has a long, mesopterygoid fossa which ex- 

 tends well in front of the lateral ones. The nasal bones 

 are broadly triangular and project out on the sides, over- 

 hanging the anteorbital fossa. The bush duikers inhabit 

 scattered bush country on the edge of plains and are never 

 found in the forests. They show great adaptability, being 

 found throughout a greater altitudinal range than any other 

 hoofed mammal in Africa. In equatorial Africa they are 

 the only antelope which occurs as high as the alpine mead- 

 ows near the snow-line. At such high altitudes they are 

 quite as abundant as in the game country proper or in the 

 maritime districts. The genus occurs from the Cape north- 

 ward to the highlands of Abyssinia and westward across 

 the Nile and Niger watersheds to Senegal. It is, however, 

 absent from the Congo forest area, which is the centre of 

 abundance of the forest duikers. The genus is represented 

 by a single species, grimmia^ which is separable into numer- 

 ous geographical races. The species attains its maximum 



