CONTENTS 



Preface to the Second Edition ix 



1. Evolution Seen in Perspective 1 



2. Changing Animals 7 



3. Evolution as Seen in the Structure of Modern Animals 20 



4. Evolution as Seen in Embryonic Development 45 



5. Evolution as Seen in Chemical Structure and in Metabo- 

 lism 79 



6. Evolution as Seen in Serological Tests 109 ' 



7. Evolution as Seen in the Geologic Record: Nature of 



the Record 127 



8. Evolution as Seen in the Geologic Record: Pre- 

 Cambrian and Paleozoic Eras 143 



9. Evolution as Seen in the Geologic Record: Mesozoic Era 173 



10. Evolution as Seen in the Geologic Record: Cenozoic Era 193 



11. Evolution as Seen in the Geologic Record: Evolution of 

 Man 218 



12. Evolution as Seen in the Geographic Distribution of 

 Animals: Continents 258 



13. Evolution as Seen in the Geographic Distribution of 

 Animals: Oceanic Islands 279 



14. Evolution as Seen in the Classification of Animals 306 



vii 



