THE GAZELLES AND THEIR ALLIES 599 
Doctor G. A. Fischer, during his exploration of the 
lower Tana Valley in 1878, collected the first specimens of 
this gazelle at Gelidja, near the delta of the Tana. This 
material was referred by Doctor Peters to Gazella granti in 
his report on the collection of mammals made by Fischer. 
A figure of the skull and horns published by Peters led 
Doctor Gunther, some five years later, to the conclusion 
that they represented a species different from granti , owing 
to the difference in horn shape and size. He described the 
species as new, naming it for Doctor Wilhelm Peters, direc¬ 
tor of the Berlin Museum. 
Peters gazelle may be known by the following char¬ 
acters: white rump patch divided widely by the extension 
of the body color to the tail base, the dorsal bridge of cin¬ 
namon being almost as wide a separation as in Gazella 
thomsoni; width of white rump patch on sides of thighs 
much less than in granti; dark pygal stripe wide and pro¬ 
nounced, but dark lateral band wanting in adult males; 
horns short and narrow and without the lyrate spread or 
S-shaped curve backward as in granti; body size smaller. 
No flesh measurements of specimens are available. 
The horns seldom exceed 21 inches in length along the curve, 
or more than 8 inches in spread near the tips. Specimens 
are recorded from the Taru Desert, Mount Pika-Pika, 
Merereni on the coast of Formosa Bay and the mouth of 
the Tana River. 
Thomson Gazelle 
Gazella thomsoni 
The small gazelle of East Africa is distinguishable from 
the large Grant gazelle by many important characters other 
than size. The small size and parallel direction of the 
horns at once distinguish the male. The black lateral band, 
which is equally well developed in both sexes, is of a different 
character than the black band of the female Grant gazelle, 
in which the white of the belly is separated from the black 
by a narrower fulvous band. In the Thomson gazelle the 
black band borders the white of the under-parts, and is as 
well marked in old age as in youth. The Thomson gazelle 
differs further from its larger associate by the possession 
