Bulletins of the Zoological Society of San Diego
BULLETINS OF THE Zoological Society of San Diego No. 24 A Key to the Snakes of the United States Second Edition By C. B. PERKINS Herpetologist, Zoological Society of San Diego SAN DIEGO, CALIFORNIA AUGUST 20, 1949 Digitized by the Internet Archive in 2017 with funding from IMLS LG-70-15-0138-15 https://archive.org/details/bulletinsofzoolo2419unse Zoological Society of San Diego Founded October 6, 1916 BOARD OF DIRECTORS L. M. Klauber, President John P. Scripps, First Vice-President Dr. T. O. Burger, Second Vice-President Fred Kunzel, Secretary Robert J. Sullivan, Treasurer F. L. Annable, C. L. Cotant, Gordon Gray, Lawrence Oliver, L. T. Olmstead, H. L. Smithton, Milton Wegeforth STAFF OF ZOOLOGICAL GARDEN Executive Secretary, Mrs. Belle J . Bcnchley General Superintendent, Ralph J . Virden Veterinarian, Dr. Arthur L. Kelly Supervisors : Grounds, B. E. Helms Birds, K. C. Lint Reptiles , C. B. Perkins Mammals, Howard T. Lee General Curator, Ken Stott, Jr. Education, Cynthia Hare Ketchum Food Concessions, Lisle Vinland Purchasing Agent, Charles W. Kern BULLETINS OF THE ZOOLOGICAL SOCIETY OF SAN DIEGO No. 24 A KEY TO THE SNAKES OF THE UNITED STATES Second Edition by C. B. Perkins Herpetologist, Zoological Society of San Diego SAN DIEGO. CALIFORNIA August 20, 1949 CONTENTS Introduction to the Second Edition 5 ** . • M Introduction to the Eirst Edition 6 A List of the Snakes of the United States 7 Use of Key 14 Generic Key 15 Synoptic Key 22 Key to Each Genus (Alphabetically Arranged) 24 Drawings Showing Scale Nomenclature. 71-72 Glossary 73 Index 76 Frye & Smith, Ltd., San Diego ——— —— Perkins: A Key to the Snakes of the United States 5 Introduction to Second Edition Since 1940 when the first edition of A KEY TO THE SNAKES OF THE EINITED STATES was published there have been a great many changes in nomenclature in the snakes of the 1 United States.
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