| Author: | Frank E. Beddard | ISBN: | 1230000156353 |
| Publisher: | Lost Leaf Publications | Publication: | July 31, 2013 |
| Imprint: | Language: | English |
| Author: | Frank E. Beddard |
| ISBN: | 1230000156353 |
| Publisher: | Lost Leaf Publications |
| Publication: | July 31, 2013 |
| Imprint: | |
| Language: | English |
Author Preface:
he importance of earthworms in questions relating to geographical distribution is so universally admitted that it seemed to me convenient to embody in a short volume the principal facts.
It became necessary in order to accomplish this task in an adequate fashion to preface the distributional facts with some anatomical and zoological data. I have reduced this section of the book to a minimum and I trust that the illustrations will enable the reader, who is not specially acquainted with the structure of these animals, to obtain an idea of their general features and variability in external character and internal anatomy. While the use of technical terms is inevitable in presenting such details, it will be found, I think, that a reference to the figures will render them intelligible.
vi Since this volume mainly deals with the phenomena of distribution, I have included in my survey nearly all of the usually admitted genera of worms, particularly of the terrestrial forms, which are in the light of our present knowledge the more important in considering this subject.
F. E. B.
Zoological Society of London.
December, 1911.
CONTENTS
CHAP. PAGE
I. Structural and Systematic 1
II. Mode of Life 43
III. The external features of Earthworms and their
relation to habit and environment 59
IV. Sense Organs and Senses of Earthworms 64
V. Relative frequency of Earthworms in different
regions of the World 70
VI. Peregrine forms 96
VII. The Earthworms of Oceanic Islands 109
VIII. Movement and Migration among Earthworms 113
IX. The Geographical Distribution of Earthworms 129
List of Literature referring to Earthworms 144
Index 146
Author Preface:
he importance of earthworms in questions relating to geographical distribution is so universally admitted that it seemed to me convenient to embody in a short volume the principal facts.
It became necessary in order to accomplish this task in an adequate fashion to preface the distributional facts with some anatomical and zoological data. I have reduced this section of the book to a minimum and I trust that the illustrations will enable the reader, who is not specially acquainted with the structure of these animals, to obtain an idea of their general features and variability in external character and internal anatomy. While the use of technical terms is inevitable in presenting such details, it will be found, I think, that a reference to the figures will render them intelligible.
vi Since this volume mainly deals with the phenomena of distribution, I have included in my survey nearly all of the usually admitted genera of worms, particularly of the terrestrial forms, which are in the light of our present knowledge the more important in considering this subject.
F. E. B.
Zoological Society of London.
December, 1911.
CONTENTS
CHAP. PAGE
I. Structural and Systematic 1
II. Mode of Life 43
III. The external features of Earthworms and their
relation to habit and environment 59
IV. Sense Organs and Senses of Earthworms 64
V. Relative frequency of Earthworms in different
regions of the World 70
VI. Peregrine forms 96
VII. The Earthworms of Oceanic Islands 109
VIII. Movement and Migration among Earthworms 113
IX. The Geographical Distribution of Earthworms 129
List of Literature referring to Earthworms 144
Index 146
