1: Gemsbuck 2: Beisa 3: Fringe-eared beisa 4: Addax head and hoof.
Date 1899
Source http://biodiversitylibrary.org/page/37141614#page/450/mode/1up
Author Rowland Ward, Limited. [d. 1912]
Source: https://commons.wikimedia.org/wiki/File:Oryx_heads.jpg

The gemsbok or gemsbuck (Oryx gazella) is a large antelope in the Oryx genus. It is native to the arid regions of Southern Africa, such as the Kalahari Desert.

The fringe-eared oryx (Oryx beisa callotis) is a subspecies of East African oryx. Fringe-eared oryxes are found only in southeastern Kenya and northeastern Tanzania.

The East African oryx (Oryx beisa), also known as the beisa is a species of antelope from East Africa.

The addax (Addax nasomaculatus), also known as the white antelope and the screwhorn antelope, is an antelope of the genus Addax and family Bovidae, that lives in the Sahara desert.