THE GAZELLES AND THEIR ALLIES 621 
of Lake Tanganyika. Specimens from the Northern Guaso 
Nyiro region have recently been described by a Swedish 
naturalist, Inar Lonnberg, as a new race, based upon their 
apparently lighter color and longer nasal bones. The impalla 
from this region in the National Museum, however, show 
no differences in color or other characters by which they 
may be distinguished from specimens from the highland 
region. 
