144 MOSTLY MAMMALS 
should have a division to itself, may admit of argument; 
but at any rate it has many peculiar animals, among which 
are a number of antelopes. 
Lastly we have the Saharan sub-region, which contains a 
comparatively limited fauna, passing by almost insensible 
degrees into that of Northern Africa. 
In some respects, especially in its galagos, the fauna of 
; Africa presents a certain resemblance to that of Madagascar ; 
but the connection between that island and the mainland 
was evidently very remote, and must apparently have 
taken place before the great incursion of antelopes, zebras, 
rhinoceroses, monkeys, elephants, etc., from the north, as 
none of these are found in the island. Madagascar, there- 
fore, is best regarded as forming a zoological province by 
itself. 
Within the limits of a single article it is manifestly 
impossible to give anything like an adequate sketch of the 
fauna of such an extensive area, but such points as have 
been noticed serve to show in some faint degree its richness 
in peculiar forms of animal life. 
It may be added that North-Eastern Africa has an extinct 
' mammalian fauna of its own, which seems to include the 
"ancestors of the elephant tribe. 
