Drawing of African Water Chevrotain (Dorcatherium aquaticum).
Date published 1883
Source Encyclopædia Britannica (9th ed.), v. 15, p. 430. See also 11th ed., v. 6, p. 115.
Author J. Smil; engraved by C. Butterworth
Source: https://commons.wikimedia.org/wiki/File:EB1911_Chevrotain.jpg

The water chevrotain (Hyemoschus aquaticus), also known as the fanged deer, is a small ruminant found in tropical Africa. It is the largest of the ten species of chevrotains, basal even-toed ungulates which are similar to deer but are barely larger than small dogs.