CHAPTER XVIII 
THE GAZELLES AND THEIR ALLIES 
Subfamily Antilopince 
The gazelles are typical of the subfamily Antilopince , 
but with them are banded several peculiar or specialized 
genera. In East Africa we have two of these, the elon¬ 
gated, spidery gerenuk and the graceful, bush-haunting 
impalla. The various members agree, however, in having 
a large narial chamber, short nasal bones, and narrow cheek¬ 
teeth, and by these characters they may be distinguished 
from other antelopes. They are medium-sized antelopes 
with slender legs, short tails, and usually short-haired coats, 
showing fulvous or tawny coloration with black facial and 
flank stripes. The females are hornless in many of the 
genera and the mammae formula ranges from two to four. 
They are typically an open-plains or desert stock with short, 
narrow ears, but many of the members have taken to a life 
in bushy areas while others have invaded high mountain 
plateaux. The subfamily ranges from central Asia west¬ 
ward to southeastern Europe and southward over the whole 
of Africa except the Congo forest tract. Geologically, the 
group has been represented since Miocene time in Asia 
and Europe and in the Mediterranean region of Africa 
since the Pliocene. 
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