THE LIFE OF MAMMALS 
the fleeing quarry. It was great fun for us, and usually did no 
harm to the antelope. No better pictures of antelope hunting 
in every form can be found than those by Mr. Roosevelt in the 
books already commended to the reader. 
Another familiar animal, standing with the pronghorn in a 
“betwixt and between” position as to antelopes and deer, is the 
giraffe. In most of its characteristics it is deerlike, 
but neither sex has antlers, while both bear on their 
forehead skull projections covered with hairy skin as in the 
pronghorn; but this skin never hardens into horn. It appears 
Giraffes. 
Copyright, N. Y. Zoblogical Society. Sanborn, Phot, 
NORTH AFRICAN GIRAFFES IN THE NEW YORK ZOOLOGICAL PARK, 1906. 
probable, however, that in the Sivatherium, a gigantic prede- 
cessor of the giraffe, fossil in the Pliocene formations of India, 
the horns were sheathed, and, moreover, were forked as in the 
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