x Illustrations 



PAGE 



Figure 17. Development of Antlers of Red Deer 128 



Figure 18. The Leaf-Butterfly, Kallima, Illus- 

 trating Protective Coloration 134 



Figure 19. Leaf-Insect, Phyllium 136 



Figure 20. Adaptations in Barnacle 138 



Figure 21. A Chamseleon on a Branch 142 



Figure 22. Third Eyelid in Man and Bird 198 



Figure 23. Darwin's Point in Man's Ear 200 



Figure 24. Man's Genealogical Tree 208 



Figure 25. Pithecanthropus, Neanderthal Man, 



and Cro-Magnon Man facing page 211 



