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Hab. Coast of Western Africa from Cameroons to Gaboon. 
Although the great wood-region of Western Africa has been repeatedly 
visited by naturalists since the days of Afzelius in the last century, and many 
collections have been formed there, very little has been recorded respecting 
the habits of the mammals of this part of the continent. The reason of this, 
no doubt, is mainly the impenetrable nature of the forests and bush which 
cover the whole country and which allow much fewer observations to be 
made upon the habits and peculiarities of the animals than in the more open 
and easily traversed districts of the Ethiopian Region. Of the present and 
several other species of this genus of Antelopes, for example, we shall see 
that very little information can be given except what results from the 
examination of their skins and skulls brought home as specimens for our 
museums. | 
Skull of Cephalophus nigrifrons. 
(P. Z. 8. 1871, p. 598.) 
Like Harvey’s Duiker of Eastern Africa, the Black-fronted Duiker, which 
is its representative and close ally in the great western wood-region, carries a 
coat of a nearly uniform chestnut. Like C. harveyi, also, it has a distinct 
black blaze down the centre of the face, whence the appropriate name 
C. nigrifrons has been bestowed on it. Its distinctions from Harvey’s Duiker, 
as pointed out by Thomas, are that it is of a much more uniform colour 
all over and hardly paler below, while in the last-named species the cheeks, 
sides of the neck, and throat are of a pale bay, and the chin is white as in 
