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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