Upper Tertiary Formation

Lower Tertiary

64

Cretaceous

64

CEPHALOPODS
MOL

66

64

I Palæozoic Age.

Metamorphic Rocks.

CRUST OF THE EARTH AS RELATED TO

ZOOLOGY.

"

CASTEROPODS

TOUCHING

THE STRUCTURE, DEVELOPMENT, DISTRIBUTION,

AND NATURAL ARRANGEMENT

OF THE

RACES OF ANIMALS, LIVING AND EXTINCT

WITH NUMEROUS ILLUSTRATIONS.

PART I.

COMPARATIVE PHYSIOLOGY.

FOR THE USE OF SCHOOLS AND COLLEGES.

BY

LOUIS AGASSIZ AND A. A. GOULD.

KEVISED EDITION.

BOSTON:

GOULD AND LINCOLN,

59 WASHINGTON STREET.

NEW YORK: SHELDON AND COMPANY.

CINCINNATI: GEO. S. BLANCHARD.

1860.

QL
47
A28
1860

Entered, according to Act of Congress, in the year 1851,

BY GOULD AND LINCOLN,

In the Clerk's Office of the District Court for the District of Massachusetts

G C. Rand & Co., Printers, Cornhill