48 POPULAR OFFICIAL GUIDE. 
GREAT GRAY KANGAROO. 
from belonging to that genus. It is an inhabitant of the 
brushy plains of India, and enjoys the unique distinction of 
possessing two pairs of horns. In addition to the 4-inch 
pair, normally placed, it has a much smaller pair, usually 
only 1 inch in height, which rises from the central area of 
the forehead. I believe it is the only species of antelope 
which possesses two pairs of horns. 
The Springbuck, (Antidorcas euchore), is to South Africa 
as the ‘‘prong-horn’’ is to our great western plains. Once, 
both were abundant, and the first hoofed animal to greet the 
traveler who entered their respective domains. To-day, 
both species are so nearly extinct that the hunter must 
search long before finding even one. The Springbuck re- 
ceived its name in recognition of its remarkable habit of 
leaping high into the air when running—a habit which also 
is displayed by the black-buck of India. 
The Gazelles are found only in Asia and Africa, and the 
number of species is about 25. In general terms they may 
be described as dainty antelopes,—so slender and delicate in 
leg construction that it seems strange that such slender 
bones can support a tall animal without breaking. 
The Dorcas Gazelle, of Arabia, (Gazella dorcas), is the 
species which most frequently finds its way into captivity, 
and it will serve very well as a specimen species for the 
whole group. Despite its delicate and frail appearance, it 
