xii 
i De 
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LIST OF ILLUSTRATIONS 
The Track of a Three-toed Dinosaur 
A Great Sea Lizard, T'ylosaurus Dyspelor . 
From a drawing by J. M. Gleeson. 
Jaw of a Mosasaur, Showing the Joint that 
Increased the oe eats of that 
Reptile 
Koch’s Hydrarchus. eihisaad of Portions 
of the Skeletons of Several Zeuglodons 
A Tooth of Zeuglodon, One of the “Yoke 
Teeth,” from which it derives the name 
Archeopteryx, the Earliest Known Bird 
From the specimen in the Berlin Museum. 
Nature’s Four Methods of Making a Wing: 
Bat, Pteryodactyl, Archeopteryx, and 
Modern Bird : ; : 
Young Hoactzins 
Hesperornis, the Great Toothed Diver 
From a drawing by J. M. Gleeson. 
Archeopteryx . 
As Restored by Mr. Pycraft. 
Thespesius, a Common Herbivorous Dinosaur 
of the Cretaceous 
From a drawing by Charles R. Knight. 
A Hind Leg of the Great Papeoeatirns, the 
Largest of the Dinosaurs : 
Page 
AT 
52 
54 
62 
69 
70 
"2 
15 
82 
89 
90 
96 
—=—- ee 
SO 
