Caption:
Iguanodon and Megalosaurus struggle for mastery in a Cretaceous Period forest, from Louis Figuier's The World Before the Deluge, 1867 American edition. Iguanodon and Megalosaurus were the first two dinosaurs to be named and described. Here Iguanodon has a spike on its nose; later it was discovered that the "spike" was actually from its thumb. Megalosaurus is now know to have been bipedal, and to have lived during the Middle Jurassic.