Its Geographic and Climatic Changes. 16

CHAPTER III. Kinds of Dinosaurs. Common Characters and
Differences between the various Groups.
Classification. 25

CHAPTER IV. The Carnivorous Dinosaurs--Allosaurus,
Tyrannosaurus, Ornitholestes, etc. 33

CHAPTER V. The Amphibious Dinosaurs--Brontosaurus,
Diplodocus, etc. 60

CHAPTER VI. The Beaked Dinosaurs.
The Iguanodonts--Iguanodon, Camptosaurus. 75

CHAPTER VII. The Beaked Dinosaurs (continued). The
Duckbilled Dinosaurs--Trachodon, Saurolophus. 82

CHAPTER VIII. The Beaked Dinosaurs (continued). The
Armored Dinosaurs--Stegosaurus, Ankylosaurus. 101

CHAPTER IX. The Beaked Dinosaurs (concluded). The
Horned Dinosaurs--Triceratops, etc. 107

CHAPTER X. Geographical Distribution of Dinosaurs. 114

CHAPTER XI. Collecting Dinosaurs. How and Where they are
Found. The First Discovery of Dinosaurs in
the West. The Bone-Cabin Quarry. Fossil
Hunting by Boat in Canada. 116

PREFACE.

This volume is in large part a reprint of various popular descriptions
and notices in the American Museum Journal and elsewhere by Professor
Henry Fairfield Osborn, Mr. Barnum Brown, and the writer. There has
been a considerable demand for these articles which are now mostly out
of print. In reprinting it seemed best to combine and supplement them
so as to make a consecutive and intelligible account of the Dinosaur
collections in the Museum. The original notices are quoted verbatim;
for the remainder of the text the present writer is responsible.
Professor S.W. Williston of Chicago University has kindly contributed
a chapter--all too brief--describing the first discoveries of
dinosaurs in the Western formations that have since yielded so large a
harvest.

The photographs of American Museum specimens are by Mr. A.E. Anderson;
the field photographs by various Museum expeditions; the restorations
by Mr. Charles R. Knight. Most of these illustrations have been
published elsewhere by Professor Osborn, Mr. Brown and others. The
diagrams, figs. 1-9, 24, 25, 37 and 40, are my own.

W. D. M.