Animals of the Past: An Account of Some of the Ancient World

abundant American Museum ancestor ancient Archeopteryx beast birds body bones Brontosaurus carnivorous climate covered creatures Cretaceous deposits Dinosaurs Diplodocus discovery earth eggs elephant Eocene Eohippus Epyornis Europe evidence existence extermination extinct animals fact feathered giant feet long fish flightless flying foot footprints fore fossil habits head Hesperornis hind horse huge Ichthyosaurs inches long indicate Jurassic known land larger largest legs length light limbs living lizards mammals mammoth mastodon Miocene Moas Mosasaurs mounted Museum of Natural Mylodon National Museum Natural History North America ostrich past perished plates Plesiosaurs Pliocene pounds preserved pretty prey probably Professor Pteranodon Pterodactyls race reader remains reptiles restoration rock sand sharks shell skeleton skull species specimen spines Stegosaurus stone strata structure tail teeth tion to-day tooth Trachodon tracks Triceratops tusks United States National vertebræ weight whale wings Zeuglodon