CONTENTS 



INTRODUCTION 



Colour in Natufe and in Organisms — Characters of the Colours of 

 Organisms and their General Importance — Method of Treatment 

 Adopted . .... Page i 



CHAPTER I 



THE COLOURS OF ORGANISMS 



Colour Phenomena in General — Distinctions between Pigmental and 

 Structural Colours — Characters of Structural Colours and their 

 Classification — Production of Light by Organisms (Phosphor- 

 escence) ..... 6 



CHAPTER II 



THE PIGMENTS OF ORGANISMS 



Natural and Artificial Pigments — Classification of Pigments — Pig- 

 ments of Direct Physiological Importance — Derived Pigments 

 — Waste Products — Reserve Products — Introduced Pigments 

 — Distribution of Pigmental Colours — Spectroscopic Characters 

 of Pigments . . ... 25 



