10 CONTENTS 



PART III 

 Vertebrate 



PAGE 



15. PISCES 185 



16. AMPHIBIA 199 



17. REPTILIA 211 



18. AVES 226 



19. MAMMALIA 261 



PART IV 

 Animal Life 



20. FROM EGG TO ADULT 293 



21. SENSES OF ANIMALS 303 



22. PROTECTION FROM ENEMIES 310 



23. PARASITISM 323 



24. VANISHING SPECIES 334 



25. ORIGIN OF THE DIVERSE FORMS OF ANIMA.L LIFE . . , 342 



