Water Reptiles of the Past and Present

by Samuel Wendell Williston

THE UNIVERSITY OF CHICAGO PRESS
CHICAGO, ILLINOIS

Agents

THE CAMBRIDGE UNIVERSITY PRESS
LONDON AND EDINBURGH

THE MARUZEN-KABUSHIKI-KAISHA
TOKYO, OSAKA, KYOTO

KARL W. HIERSEMANN
LEIPZIG

THE BAKER & TAYLOR COMPANY
NEW YORK

WATER REPTILES OF THE
PAST AND PRESENT

BY

Samuel Wendell Williston

Professor of Paleontology in the
University of Chicago

THE UNIVERSITY OF CHICAGO PRESS
CHICAGO, ILLINOIS

Copyright 1914 by
The University of Chicago

All Rights Reserved
Published October 1914

Composed and Printed By
The University of Chicago Press
Chicago, Illinois, U.S.A.