The Natural History Museum, Part 4: The Rise of Mammals

Mesonyx

 Andrewsarchus skull (nearly 3 feet long!)

 Arsinoitherium

 Clockwise: Deinotherium skull, Moeritherium model, Phiomia skull, and Gomphotherium skull. 

(Chronological order: Moeritherium, Phiomia, Deinotherium, Gomphotherium)

 Clockwise: Moropus skeleton, Megacerops skull, Hyracotherium model.

(Chronological order: Hyracotherium, Megacerops, Moropus)

 Paleoparadoxia (front)

Paleoparadoxia (side)