Dr. Murie notices the inflation of the post-maxilla in the saiga, and states that a similar extension is to be found in the chiru.
This genus differs from Gazella by having only two lower premolars as in saiga.
The chiru, which belongs to the typical or antilopine section of antelopes, is probably allied to the saiga.
Gesner has mentioned this animal under the name of colus, and Gmelin under that of saiga.
The horns of the antelopes are black and opaque; those of the saiga, on the contrary, are whitish and transparent.
Hodgson was apparently not well acquainted at the time with saiga, or he would have certainly alluded to the affinity.