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MALE AND FEMALE WOOD DUCK. TO SHOW SECONDARY SEXUAL CHARACTERS.

[From photographs of stuffed specimens in the Collection of the Maryland Academy of Sciences.]

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All 3558.03.11?
$ 7938.9.50

1883. Nov. 8,

Bowditch Fund'

COPYRIGHT, 1883,

BY

JOHN MURPHY & CO.

ΤΟ

THE MEMORY OF

CHARLES DARWIN,

FROM WHOSE STORE OF PUBLISHED FACTS I HAVE

DRAWN MOST OF THE MATERIAL FOR THIS

VOLUME.

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