XI. A Gigantic Horned Dinosaur, Triceratops prorsus _Frontispiece_ XXIV. Sir Richard Owen and Skeleton of Dinornis maximus ix I. Sea-scorpions 25 II. Fish-lizards 41 III. Pterodactyls--Long-necked Sea-lizard--Cuttle-fish or Belemnite 55 IV. A Gigantic Dinosaur, Brontosaurus excelsus 69 V. Thigh-bone of the Largest of the Dinosaurs, Atlantosaurus 71 VI. A Carnivorous Dinosaur, Megalosaurus Bucklandi 79 VII. A Gigantic Dinosaur, Iguanodon Bernissartensis 97 VIII. A Gigantic Dinosaur, Iguanodon Mantelli 101 IX. An Armoured Dinosaur, Scelidosaurus Harrisoni 105 X. A Gigantic Armoured Dinosaur, Stegosaurus ungulatus 113 XII. Group of Small Flying Dragons, or Pterodactyls 131 XIII. Group of Sea-serpents, Elasmosaur, and Fishes 141 XIV. A Large Extinct Mammal, Tinoceras ingens 151 XV. A Huge Extinct Mammal, Brontops robustus 161 XVI. A Gigantic Hoofed Mammal, Sivatherium giganteum 169 XVII. Skeleton of Great Ground Sloth of South America 179 XVIII. Great Ground Sloth of South America, Megatherium americanum 181 XIX. A Gigantic Armadillo, Glyptodon asper 189 XX. The Mammoth, Elephas primigenius 205 XXI. The Mastodon of Ohio, M. americanus 219 XXII. The Woolly Rhinoceros, Rhinoceros tichorhinus 225 XXIII. Moa-birds 233 XXV. The Great Irish Deer, Cervus megaceros 243 XXVI. Steller's Sea-cow, Rhytina gigas 249 LIST OF FIGURES IN TEXT. FIG. PAGE