CONTENTS 
xi 
Coloration—Colour Variation in Larvae—Colours of Reptiles, 
especially Lizards and Snakes — The Origin of Markings in 
Snakes Page 225 
CHAPTER XII 
THE COLOURS OF BIRDS 
General Characters of the Coloration of Birds—Sexual Coloration- 
Distribution of Colour and Colour Variation—Food and Colour — 
Pigments of Birds, their Characters and Distribution—Pigments 
of Birds’ Eggs—Markings of Feathers . . . 242 
CHAPTER XIII 
the COLOURS OF BIRDS ( Continued ) 
The Structure of Feathers—Relation between Structure and Colour 
—The Colours of Sun-birds, Humming-birds, and Birds of 
Paradise, their Distribution and Characters—Markings of King¬ 
fishers—General Characters of the Colours of Birds—Meaning 
of Colour in Birds . 2 ^ 2 
CHAPTER XIV 
THE COLOURS OF MAMMALS AND THE ORIGIN OF PIGMENTS 
Coloration of Mammals—Pigments of Mammals—Colour of the Hair 
and Skin in Man, and its Bearing on General Problems—Origin 
of Melanin — Pigment and Waste Products — Experimental 
Evidence—Conclusions—Criticism of these Conclusions 286 
