Four-horned rhinoceros-like animal defending itself against by two small prehistoric hyenas in foreground, another attack occuring in background.

Depicts two quadrupeds facing each other in front of a lake; one has its mouth wide open and the other is looking into it.

Three-quarter view of head and neck of a Miocene dog. Signed and dated "Feb. 1902" at lower left.

Two rhinoceros-like mammals with six horns and large canines, one grazing in background, the other standing in profile view in center. The Eobasileus is closely related to Uintatherium.

Herd of running horse-like prehistoric mammals, which were actually more closely related to rhinoceroses.

Painting of weasel-like prehistoric mammal baring its teeth at a crocodile swimming in a stream. Signed and dated at lower left: Chas. R. Knight, 1906.