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Cenozoic mammals - Canis Dirus
Sketch of a coprolite—fossilized animal excrement
Sketch of a gastrolith—the gizzard stone of an ancient reptile
Geologic time scale
Problematical Animal
Priest smoking
Problematic Animal
Mountain Sheep
Paint mortar, Diam 2½″.
Pictographs
Man with curved stick
Hunters
Grasshopper
Handled mortar
Hopi curved stick
Frog fetish
Fishes
Frog
Fetish
Fetish
Fish
Fawn
Braided handle
Dancing Figure
Bird C
Bird F
Bird A
Bird B
Two Wolves
Unidentified animal
Small bowl
Stone axe
Prehistoric Man
Stone Age Man
Prehistoric Men Attacking the Great Cave Bears
Scene from the Prehistoric World - Early Ice Age
The Saurian Age
Reconstruction of coal-forming swamp
Woolly mammoth
Limits of ice age glaciers
Extent of the main glacial advances
Cephalaspis and Loricaria, an Ancient and a Modern Armored Fish
Pterichthys, the Wing Fish
The oldest fossil fish known—discovered in the Upper Silurian strata of Scotland, and named Birkenia by Professor Traquair
The walking-fish or mud-skipper (Periophthalmus)
Palæomastodon
molars of elephants
Head of the early ancestor of elephants
Australian Lung Fish
Some Mesozoic Reptiles