DUIKERS AND SMALL ANTELOPES 543 
bush duikers, but serves as a barrier to their migration 
downward to the plains, which are inhabited by another 
closely allied race, hindei. We have the same conditions 
duplicated on Mount Kenia, the same race of high moun¬ 
tain duikers, altivallis , inhabiting the moorland down to 
the beginning of the dense bamboo and forest zone which 
absolutely limits their lower vertical range and keeps them 
apart from their close allies of the plains below. 
The dorsal coloration is ochraceous-tawny, heavily 
lined by black, the latter predominating and giving a 
Prout’s brown general effect, the hair basally being 
broccoli-brown. The rump is somewhat grayer than the 
back. The sides of the body and the neck are tawny-olive, 
the color merging gradually into the white under-parts. The 
neck and the sides are without black vermiculation. The top 
of the head is bright cinnamon-rufous, with a broad median 
band of black from the rhinarium to the coronal tuft; the tuft, 
however, is chiefly cinnamon-rufous. The sides of the face 
are lighter or cinnamon. The under-parts are white, the 
hair basally being ecru-drab. The chest is mixed with fawn 
centrally. The lower throat is tawny-olive, like the sides. 
The throat and the median line of the chin and the upper lips 
are white, but the sides of the chin are seal-brown, in marked 
contrast. The hind legs are vermiculated with black, like the 
rump. The pastern region above the hoofs is seal-brown, 
which is continued a few inches above as a faint streak. 
The forelegs are vermiculated with black, like the hind, 
and the seal-brown of the pasterns is more extensive and 
extends up the front of the limbs nearly to the shoulders. 
The ears are clothed by short tawny hairs on the outside 
and inside with long white hair. 
Four specimens, two males and two females, of this 
race, from the summit of the Aberdare Range, have been 
examined at the National Museum. The larger male speci¬ 
men measured in the flesh: head and body, 34 inches; tail, 
4 inches; hind foot, 104^ inches; ear, 4inches. Length 
of skull, inches. The horns of this specimen measured 
4 Y& inches in length by 1% inches in spread at the tips. 
The two female specimens are slightly larger than these 
dimensions. 
