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 Gazeila granti in 

 his report on the collection of mammals made by Fischer. 

 A figure of the skull and horns published by Peters led 

 Doctor Giinther, 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 



