CONTENTS OF VOL. I. 
PAGE 
Editor's notice, ix 
Biographical memoir, xi 
Alphabetical catalogue of authors whose 
works are referred to in this volume, 
American authors, 9 
Foreign authors, 13 
Author's preface, 19 
Introduction, 29 
I. Of the rise of scientific zoology in the united 
states, with notices of naturalists, particularly 
connected with the subject of this work, . . 31 
II. Of the ignorance and neglect of American labors 
IN ZOOLOGY EXHIBITED BY EUROPEAN NATURALISTS, 56 
III. Of some of the obstacles impeding the study of 
ZOOLOGY, AND THE MEANS OF OVERTHROWING THEM, 63 
IV. OF CLASSIFICATION, 84 
V. Of THE GEOGRAPHICAL DISTRIBUTION OF GENERA AND 
SPECIES, AND THE EXISTING CAUSES INFLUENCING IT, 99 
Geographical Features of the Country, . . . 100 
Climate, 110 
Geological Structure, 112 
Vegetal ion, 113 
Humidity and Dryness, 113 
Elevation, . . . . . . • 115 
Sudden and Extreme Vicissitudes of Temperature, 127 
Inundations of Rivers, 130 
Fires, 131 
Agriculture, . 132 
Destruction by Animals, 13.". 
Proximity to the Sea, 135 
Local Causes, ....... 138 
