The Mastodon
The Missourium of Koch, from a Tracing of the Figure Illustrating Koch's Description
The Mammoth as Engraved by a Primitive Artist on a Piece of Mammoth Tusk
Tooth of Mastodon and of Mammoth
Skeleton of the Mammoth in the Royal Museum of St. Petersburg
The Development of the Horse
Skeleton of the Modern Horse and of His Eocene Ancestor
Leg of a Horse Compared with that of the Giant Moa
The Three Giants, Phororhacos, Moa, Ostrich
Skull of Phororhacos Compared with that of the Race-horse Lexington
Skull of Ceratosaurus
The Horned Ceratosaurus, a Carnivorous Dinosaur
A Single Vertebra of Brontosaurus
Skeleton of Triceratops
A Hind Leg of the Great Brontosaurus, the Largest of the Dinosaurs
Thespesius, a Common Herbivorous Dinosaur of the Cretaceous
Archæopteryx
Hesperornis, the Great Toothed Diver
Young Hoactzins
Nature's Four Methods of Making a Wing - Bat, Pteryodactyl, Archæopteryx, and Modern Bird
A Tooth of Zeuglodon, One of the 'Yoke Teeth,' from which it derives the name
Koch's Hydrarchus. Composed of Portions of the Skeletons of Several Zeuglodons
A Great Sea Lizard Tylosaurus Dyspelo
The Track of a Three-toed Dinosaur
Pterichthys, the Wing Fish
Where a Dinosaur Sat Down
Cephalaspis and Loricaria, an Ancient and a Modern Armored Fish
Skeleton of a Radiolarian Very Greatly Enlarged
Phororhacos, a Patagonian Giant of the Miocene