Two centuries ago, naturalists began to realize that the enormous, fossilized bones they'd been finding all over the world belonged to extinct animals. A lot of extinct animals, who had once ruled the planet and were now mysteriously gone. Speculation about these creatures reached a fever pitch, resulting in drawings like these.

Reptiles restored, from the remains of which are to be found in a fossil state in Tilgate Forest, Sussex, a painting by George Scharf, after the research of Gideon Mantell

Strange 19th Century Drawings of Dinosaurs and Other Extinct Animals

Mantell examined some fossil teeth in the 1820s belonged to a herbivorous reptile. After he saw teeth from an iguana, he wrongly surmised that the ancient reptile was simply a giant lizard. – according to Strange Science.

(via The University of Chicago Press Books)

A Cretaceous landscape with Gideon Mantell's Iguanodons, by Josef Kuwasseg, 1851

Strange 19th Century Drawings of Dinosaurs and Other Extinct Animals

(via Strange Science)

An Iguanodon and a Hyleosaurus, by Benjamin Waterhouse Hawkins, 1853

Strange 19th Century Drawings of Dinosaurs and Other Extinct Animals

(via Copyright Expired)

Gigantic lizards and some Pterosauria, by Benjamin Waterhouse Hawkins, 1853

Strange 19th Century Drawings of Dinosaurs and Other Extinct Animals

(via Copyright Expired)

Plesiosaurus and Ichthyosaurus,on a watercolour painting by Benjamin Waterhouse Hawkins, 1853

Strange 19th Century Drawings of Dinosaurs and Other Extinct Animals

(via Copyright Expired)

Illustrations from La Terre avant le déluge, by Louis Figuier, 1863

Megatherium

Strange 19th Century Drawings of Dinosaurs and Other Extinct Animals

An Ichthyosaurus and a Plesiosaurus

Strange 19th Century Drawings of Dinosaurs and Other Extinct Animals

A Hylaeosaurus and Teleosaurus

Strange 19th Century Drawings of Dinosaurs and Other Extinct Animals

An Iguanodon and Megalosaurus fighting

Strange 19th Century Drawings of Dinosaurs and Other Extinct Animals

(via Biblioteca de la Facultad de Derecho y Ciencias del Trabajo de la Universidad de Sevilla)

Illustrations from Les animaux d'autrefois by Victor Meunier, 1869

Palaeotherium

Strange 19th Century Drawings of Dinosaurs and Other Extinct Animals

Anoplotherium

Strange 19th Century Drawings of Dinosaurs and Other Extinct Animals

Deinotherium

Strange 19th Century Drawings of Dinosaurs and Other Extinct Animals

Teleosaurus

Strange 19th Century Drawings of Dinosaurs and Other Extinct Animals

Megalosaurus

Strange 19th Century Drawings of Dinosaurs and Other Extinct Animals

Hylaeosaurus

Strange 19th Century Drawings of Dinosaurs and Other Extinct Animals

Iguanodon

Strange 19th Century Drawings of Dinosaurs and Other Extinct Animals

Pterodactylus

Strange 19th Century Drawings of Dinosaurs and Other Extinct Animals

Rhamphorhynchus

Strange 19th Century Drawings of Dinosaurs and Other Extinct Animals

Chirotherium

Strange 19th Century Drawings of Dinosaurs and Other Extinct Animals

(via Bibliothèque nationale de France)