DUIKERS AND SMALL ANTELOPES 537 
Jackson, who appears to be the only sportsman who has met 
with this rare little 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 
Sylvie apr a 
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 
