One or more species of bats are peculiar to the country - Vespertilio stampflii, and perhaps Roussettus biittikoferi; two species of shrew (Crocidura), one dormouse (Graphiurus nagtglasii); the pygmy hippopotamus (H.
Crocodiles and two kinds of hippopotami, the ordinary and a pygmy variety, are found in the rivers.
An extremely interesting section of the population not hitherto mentioned is constituted by the Pygmy tribes inhabiting the densely forested regions along the equator from Uganda to the Gabun and living the life of nomadic hunters.
Some doubt exists whether the pygmy hog of the Nepal Terai, which is not much larger than a hare, is best regarded as a member of the typical genus, under the name of Sus salvanius or as representing a genus by itself, with the title Porcula salvania.
In the neighbourhood of Victoria Nyanza, where Hamite, Bantu, Nilotic Negro and Pygmy are found in close contact, the ethnic relations of tribes are often puzzling, but the Bantu not under a Hamitic domination have been divided by F.