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                      GUIDE TO THE STUDY OF FISHES


[Illustration:

  VARIATIONS IN THE COLOR OF FISHES

  The Oniokose or Demon Stinger, _Inimicus japonicus_ (Cuv. and Val.),
    from Wakanoura, Japan. From nature by Kako Morita.

  Surface coloration about lava rocks.

  Coloration of specimens living among red algæ.

  Coloration in deep water; _Inimicus aurantiacus_ (Schlegel).
]




                                A GUIDE
                                   TO
                          THE STUDY OF FISHES


                                   BY

                           DAVID STARR JORDAN

            _President of Leland Stanford Junior University_


           _With  Frontispieces and 507 Illustrations_


                             IN TWO VOLUMES

                                VOL II.

                             "I am the wiser in respect to all knowledge
                             and the better qualified for all fortunes
                             for knowing that there is a minnow in that
                             brook."—_Thoreau_

[Illustration]

                                NEW YORK
                         HENRY HOLT AND COMPANY
                                  1905




                            Copyright, 1905

                                   BY

                         HENRY HOLT AND COMPANY


                         Published March, 1905




                                CONTENTS
                                VOL. II.


                               CHAPTER I.

                              THE GANOIDS.

                                                                    PAGE

 Subclass Actinopteri.—The Series Ganoidei.—Are the Ganoids a          1
   Natural Group?—Systematic Position of Lepidosteus.—Gill on the
   Ganoids as a Natural Group.

                               CHAPTER II.

                       THE GANOIDS (_Continued