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Index
EARTHWORMS AND THEIR ALLIES
PREFACE
CONTENTS
CHAPTER I STRUCTURAL AND SYSTEMATIC
The Anatomy of Earthworms.
The Aquatic Families of Oligochaeta.
CHAPTER II MODE OF LIFE
Aquatic Earthworms.
Marine Species.
Earthworms originally purely aquatic animals.
CHAPTER III THE EXTERNAL FEATURES OF EARTHWORMS AND THEIR RELATION TO HABIT AND ENVIRONMENT
CHAPTER IV SENSE ORGANS AND SENSES OF EARTHWORMS
CHAPTER V RELATIVE FREQUENCY OF EARTHWORMS IN DIFFERENT REGIONS OF THE WORLD
The Range of Genera.
CHAPTER VI PEREGRINE FORMS
CHAPTER VII THE EARTHWORMS OF OCEANIC ISLANDS
CHAPTER VIII MOVEMENT AND MIGRATION AMONG EARTHWORMS
Climate as Affecting Migration.
Mountain Ranges and the Migration of Earthworms.
The Ocean As a Barrier To Migration.
Facilities of Migration.
CHAPTER IX THE GEOGRAPHICAL DISTRIBUTION OF EARTHWORMS
LIST OF LITERATURE REFERRING TO EARTHWORMS
INDEX
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