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