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OF THE

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UNIVERSITY.

PAMPHLETS.

By

Joel Asaph, Quen.

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COLLEGE LIBRARY

AUTHOR'S EDITION.

DEPARTMENT OF THE INTERIOR.
UNITED STATES GEOLOGICAL AND GEOGRAPHICAL SURVEY,

F. V. HAYDEN, V. S. Geologist-in-Charge.

THE GEOGRAPHICAL DISTRIBUTION

OF THE

MAMMALIA,

CONSIDERED IN RELATION TO THE PRINCIPAL

ONTOLOGICAL REGIONS OF THE EARTH,

AND THE LAWS THAT GOVERN THE
DISTRIBUTION OF ANIMAL LIFE.

BY

JOEL ASAPH ALLEN.

EXTRACTED FROM THE BULLETIN OF THE SURVEY, VOL. IV, No. 2.

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