Читать книгу Earthworms and Their Allies - Frank E. Beddard - Страница 2

PREFACE

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