- Skeleton of an Extinct Flightless Toothed Bird, Hesperornis
The bird was five or six feet high, something like a swimming ostrich, with a very powerful leg but only a vestige of a wing. There were sharp teeth in a groove. The modern divers come nearest to this ancient type. - Skeleton of the Mammoth in the Royal Museum of St. Petersburg
- Skeleton of the Modern Horse and of His Eocene Ancestor
- Skeleton of Triceratops
- Skeleton of Tyrannosaurus in comparison with human skeleton
This animal probably reached the maximum of size and of development of teeth and claws of which its type of animal mechanism was capable. Its bulk precluded quickness and agility. It must have been designed to attack and prey upon the ponderous and slow moving Horned and Armored Dinosaurs with which its remains are found, and whose massive cuirass and weapons of defense are well matched with its teeth and claws. The momentum of its huge body involved a seemingly slow and lumbering action, an inertia of its movements, difficult to start and difficult to shift or to stop. - Skull of Ceratosaurus
- Skull of Phororhacos Compared with that of the Race-horse Lexington
- Skulls of Dinosaurs, illustrating the principal types
Skulls of Dinosaurs, illustrating the principal types - Skulls of Horned Dinosaurs
Skulls of Horned Dinosaurs. The lower row, Ceratops, Styracosaurus, Monoclonius, are from the Middle Cretacic (Belly River formation) of Alberta; Anchiceratops is from the Upper Cretacic (Edmonton formation) of Alberta; Triceratops and Torosaurus from the uppermost Cretacic (Lance formation) of Wyoming. - Skulls of Iguanodont and Trachodont Dinosaurs
Skulls of Iguanodont and Trachodont Dinosaurs - Some Late Mesozoic Reptiles
- Some Mesozoic Reptiles
Some Mesozoic Reptiles - Some Oligocene Mammals
Some Oligocene Mammals - Some Reptiles of the Late Paleozoic Age
- The Archæopteryx
(After William Leche of Stockholm.) A good restoration of the oldest known bird, Archæopteryx (Jurassic Era). It was about the size of a crow; it had teeth on both jaws; it had claws on the thumb and two fingers; and it had a long lizard-like tail. But it had feathers, proving itself a true bird. - The Development of the Horse
- The gigantic three-horned Reptile, Triceratops
The gigantic three-horned Reptile, Triceratops, as large as an Elephant, found in Jurassic strata in North America. A model of the skeleton may be seen in the Natural History Museum in London. - The Horned Ceratosaurus, a Carnivorous Dinosaur
- The Largest Known Dinosaur
The Largest Known Dinosaur. Sketch reconstruction of Brachiosaurus, from specimens in the Field Museum in Chicago, and the Natural History Museum in Berlin. - The Mammoth as Engraved by a Primitive Artist on a Piece of Mammoth Tusk
- The Mastodon
- The Missourium of Koch, from a Tracing of the Figure Illustrating Koch's Description
- The oldest fossil fish known—discovered in the Upper Silurian strata of Scotland, and named Birkenia by Professor Traquair
The oldest fossil fish known—discovered in the Upper Silurian strata of Scotland, and named Birkenia by Professor Traquair. - The Skull and Brain-Case of Pithecanthropus
The java ape-man, as restored. By J. H. Mcgregor from the scanty remains The restoration shows the low, retreating forehead and the prominent eyebrow ridges. - The Sub-Man Pithecanthropus
Possible Appearance of the Sub-man Pithecanthropus. The face, jaws, and teeth are mere guess work. The creature may have been much less human looking than this. - The Three Giants, Phororhacos, Moa, Ostrich
- The Track of a Three-toed Dinosaur
The Track of a Three-toed Dinosaur - The walking-fish or mud-skipper (Periophthalmus)
It skips about by means of its strong pectoral fins on the mud-flats; it jumps from stone to stone hunting small shore-animals; it climbs up the roots of the mangrove-trees. The close-set eyes protrude greatly and are very mobile. The tail seems to help in respiration. - Thespesius, a Common Herbivorous Dinosaur of the Cretaceous
- Time-chart 6000 B.C. to A.D.
Time-chart 6000 B.C. to A.D. - Tooth of Mastodon and of Mammoth
- Triceratops - A Huge Extinct Reptile
(From remains found in Cretaceous strata of Wyoming, U.S.A.) This Dinosaur, about the size of a large rhinoceros, had a huge three-horned skull with a remarkable bony collar over the neck. But, as in many other cases, its brain was so small that it could have passed down the spinal canal in which the spinal cord lies. Perhaps this partly accounts for the extinction of giant reptiles. - Where a Dinosaur Sat Down
In the light of our present knowledge we are able to read many things in these tracks that were formerly more or less obscure, and to see in them a complete verification of Dr. Deane's suspicion that they were not made by birds. We see clearly that the long tracks called Anomœpus, with their accompanying short fore feet, mark where some Dinosaur squatted down to rest or progressed slowly on all-fours, as does the kangaroo when feeding quietly;[3] and we interpret the curious heart-shaped depression sometimes seen back of the feet, not as the mark of a stubby tail, but as made by the ends of the slender pubes, bones that help form the hip-joints. Then, too, the mark of the inner, or short first, toe, is often very evident, although it was a long time before the bones of this toe were actually found, and many of the Dinosaurs now known to have four toes were supposed to have but three. - Young Hoactzins