



Produced by MWS, Adrian Mastronardi, Christopher Wright
and the Online Distributed Proofreading Team at
http://www.pgdp.net (This file was produced from images
generously made available by The Internet Archive)









                                                      "THROUGH THE EYE"
                                                                 SERIES

                               EVOLUTION




                       "THROUGH THE EYE" SERIES

                        _THE FIRST TWO VOLUMES_

                 EVOLUTION. By J. A. S. WATSON, B.Sc.

              THE CIVILIZATION OF THE ANCIENT EGYPTIANS.
                         By A. BOTHWELL GOSSE.

                    _Other Volumes in Preparation_

[Illustration: FIG. 1.--Tree illustrating the probable course of animal
                              evolution.]

                               EVOLUTION

                       BY J. A. S. WATSON, B.Sc.

                   [Illustration: THROUGH THE · EYE]

   _Published by_ T. C. & E. C. JACK, LTD. 35 & 36 PATERNOSTER ROW,
                     LONDON, E.C. AND AT EDINBURGH




                      _Printed in Great Britain_




                               CONTENTS


                               CHAPTER I

                                                                    PAGE

  THE EVIDENCE FOR EVOLUTION                                           1

                              CHAPTER II

  UNICELLULAR AND MULTICELLULAR ANIMALS                               23

                              CHAPTER III

  THE WORMS AND SOME OF THEIR POSTERITY                               58

                              CHAPTER IV

  THE EARLY VERTEBRATES AND THE FISHES                                79

                               CHAPTER V

  THE CONQUEST OF THE LAND                                           104

                              CHAPTER VI

  THE MAMMALS AND MAN                                                123

 For many of the illustrations the Publishers are indebted to the
 Deutsche Verlags-Anstalt (from Günther's _Vom Urtier zum Menschen_)
 and Herr Wilhelm Engelmann (from Haeckel's