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9. A Great Sea Lizard,
Tylosaurus Dyspelor From a drawing by J. M. Gleeson. 52 10. Jaw of a Mosasaur, Showing the Joint that Increased the Swallowing Capacity of that Reptile 54 11. Koch's Hydrarchus. Composed of Portions of the Skeletons of Several Zeuglodons 62 12. A Tooth of Zeuglodon, One of the "Yoke Teeth," from which it derives the name 69 13. Archæopteryx, the Earliest Known Bird
From the specimen in the Berlin Museum. 70 14. Nature's Four Methods of Making a Wing: Bat, Pteryodactyl, Archæopteryx, and Modern Bird 72 15. Young Hoactzins 75 16. Hesperornis, the Great Toothed Diver
From a drawing by J. M. Gleeson. 82 17. Archæopteryx
As Restored by Mr. Pycraft. 89 18. Thespesius, a Common Herbivorous Dinosaur of the Cretaceous
From a drawing by Charles R. Knight. 90 19. A Hind Leg of the Great Brontosaurus, the Largest of the Dinosaurs 96 20. A Single Vertebra of Brontosaurus 97 21. Moloch, a Modern Lizard that Surpasses the Stegosaurs in all but Size
From a drawing by J. M. Gleeson. 100 22. Skeleton of Triceratops 103 23. The Horned Ceratosaurus, a Carnivorous Dinosaur
From a drawing by J. M. Gleeson. 106 24. Stegosaurus, an Armored Dinosaur of the Jurassic
From a drawing by Charles R. Knight. 108 25. Skull of Ceratosaurus
From a specimen in the United States National Museum. 110 26. Triceratops, He of the Three-horned Face
From a statuette by Charles R. Knight. 126 27. A Hint of Buried Treasures 137 28. Relics of the Moa 140 29. Eggs of Feathered Giants, Æpyornis, Ostrich, Moa, Compared with a Hen's Egg 148 30. Skull of Phororhacos Compared with that of the Race-horse Lexington 151 31. Leg of a Horse Compared with that of the Giant Moa 152 32. The Three Giants, Phororhacos, Moa, Ostrich 158 33. Skeleton of the Modern Horse and of His Eocene Ancestor 161 34. The Development of the Horse 168 35. The Mammoth
From a drawing by Charles R. Knight. 176 36. Skeleton of the Mammoth in the