The hylaeosaurus measured between twenty and thirty feet in length, and fed on vegetation.
A pair of megalosauruses, with a group of pterodactyls in the background.
"So peculiar and strange is the structure of these animals, that the first specimen discovered was classed…
This illustration shows the track of a Brontozoum Giganteum. The trac is actually eighteen inches long,…
A remarkable genus of fossil lizards, peculiar to the Mesozoic strata. Its anomalous structure was long…
A remarkable genus of fossil lizards, peculiar to the Mesozoic strata. Its anomalous structure was long…
The jaw bones of the Mosasaurus, a great snake-like reptile of the Cretaceous Period.
The lower jaw of the Hesperornis regalis, an ancient bird of the Cretaceous Period.
A vertebrae of the Hesperornis regalis, an ancient bird of the Cretaceous Period.
A vertebrae of the Hesperornis regalis, an ancient bird of the Cretaceous Period.
The skull and upper jaw of an early rhinoceros-like mammal from the Cenozoic time.
Some Mesozoic reptiles. Shown are the Brontosaurus, Stegosaurus, Pterodactyl, Camptosaurus, and the…
Some Late Mesozoic reptiles. Shown are the Tyrannosaurus, Trachodon, Triceratops, Pterodactyls, and…
"A genus of extinct flying reptiles of the order Pterosauria, found in the Jura Limestone formation,…
An illustration of an Ichthyosaurus skull. Ichthyosaurus is an extinct genus of ichthyosaur from the…
An illustration of an Ichthyosaurus skeleton. Ichthyosaurus is an extinct genus of ichthyosaur from…
The fertile plant of the Resurrection Plant (Selaginella lepidophylla), a spikemoss which lives in deserts.
An illustration of a Diplodocus skeleton and the caudal vertebrae (A and B). Diplodocus is a genus of…
Archegosaurus is a genus of amphibian which lived during the Asselian to Wuchiapingian ages of the Permian,…
Archegosaurus is a genus of amphibian which lived during the Asselian to Wuchiapingian ages of the Permian,…
Hylonomus was an early reptile. It lived 315 Ma (million years ago) during the Carboniferous period.…
Branchiosaurus (Greek for "gill lizard") is a genus of small, lightly-built early prehistoric amphibians.…
African dwarf frogs of genus Hymenochirus, also known as dwarf aquatic frogs, are frogs native to Sub…
Tracks of Chirotherium or "hand-beast" in Buntsandstein found in Hessbeg, Germany.
"Glyptodon (Glyptodon clavipes). The typical and best-known genus of the family Glyptodontidae; the…
An illustration of the skull of a megalosaurus. Megalosaurus is a genus of large meat-eating theropod…
Megatherium ("Great Beast") was a genus of elephant-sized ground sloths that lived from two million…
A brother (the spaceman) and his friend (the dinosaur) take his little sister (the alien) trick-r-treating.…
A black and white line art version of a brother (the spaceman) and his friend (the dinosaur) taking…
Found in Oueensland and other parts of Australia, this lizard belongs to the family Agamidae. It reaches…