THE COLLECTION OF FOSSIL VERTEBRATES. 
By W. D. Matruew, Ph.D., 
Associate Curator, Department of Vertebrate Paleontology. 
TABLE OF CONTENTS. 
ss SUR Soo Aho 5 
What Fossils Are. The Divisions of Geological Time. How Fossil Skele- 
tons are Mounted and Exhibited in this Hall. General Arrange- 
ment of the Collections. 
East Corripor. No. 405. Fosstl Marine Reptiles... ...........000000 10 
How they come to be Buried, Fossilized, Found and Collected. Ple- 
siosaurs. Mosasaurs. Ichthyosaurs. Fishes. 
MacrewinG. NO. 400. Fossel Mammals... . ...-- 2.5 ces seen e eee 12 
Arrangement. Titanotheres. Rhinoceroses. Horses. Primitive 
Hoofed Mammals. Primitive Clawed Mammals. Elephants, 
Mammoths and Mastodons. Artiodactyls. South American 
Fossil Mammals. Instances of Evolution. Restorations. Trans- 
parencies. Charts, etc. 
I CICS fen a Sy ink ie ey vist a Nie eee ca vest tate es cows 26 
Fossil Reptiles. 
Dinosaurs: Amphibious, Carnivorous, Beaked. Crocodiles. Lizards. 
Turtles. Primitive Reptiles. 
ON TENE RGSS hee 7 31 
Fossil Fishes. Dinichthys. Green River Fishes.................0...-. 32 
INTRODUCTION. 
WHEN we dig beneath the present surface of the ground we 
sometimes find remains of ancient cities, dwellings, bones of men 
and animals, buried many centuries ago under accumulations of 
débris, deposits of river mud or drifted sand. From these have 
been gleaned many facts concerning the early history of man- 
kind of which there is no written chronicle. From the study of 
these facts the science of Archzology has arisen, the science 
which deals with the early history of mankind, with the evolu- 
tion of civilization. 
Most of the lower animals of which the archzologist finds 
traces are like those now living, although a few have what Fos- 
become extinct. But in those more ancient deposits _ sils Are. 
which are now consolidated into clays, sandstones etc., indica- 
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