THE GAZELLES AND THEIR ALLIES 581 
Asia, and the Mediterranean coast of Africa. Later, in the 
Pleistocene age, gazelles became abundant in North Africa, 
as shown by the several species which have been discovered 
in deposits of this age in Algeria. 
Key to Species of Gazella 
Size large, horns long in the male, more than two times head; adult 
male without dark flank band usually 
Cinnamon coloration of back continued as a broad band on the 
rump to the tail and widely separating the white 
rump patch; horns short and diverging only slightly 
at tips; body size smaller peter si 
White rump patch undivided by cinnamon of back or at most 
dorsal color only continued as a narrow stripe to the 
tail; horns larger and more lyrate in shape, body size 
larger granti 
Size small, horns in the male much less than two times the length of 
the head; sides with a broad dark flank band 
Dark flank band bordering the white of the belly; sides with a 
conspicuous groin gland clothed by pithy yellow 
hair; a dark nose spot thomsoni 
Dark flank band separated by buffy band from the white belly; 
no lateral glands present; nose spot obsolete 
rufifrons 
Grant Gazelle 
Gazella granti 
Typical granti is found only in central German East 
Africa, in Ugogo, where it was originally discovered by 
Speke and Grant, in 1848, during their journey of discovery 
of the source of the Nile. This point marks the southern 
limit of Grant gazelles in Africa. Here it was found inhab¬ 
iting a dry, arid, saline valley at some 3,000 feet elevation. 
From this point the species ranges northward through the 
Rift Valley as far as Lake Zwai, in southern Abyssinia, 
where the race lacuum occurs. Westward the species 
spreads to the southern shores of the Victoria Nyanza and 
enters the Nile watershed. In this southwestern corner 
