COH'TENTS. 



PART I.— GENERAL EVOLUTION. 



L — Evolution and its Consequences 



IL — The Origin of Genera 



in. — The Theory op Evolution 



IV. — The Hypothesis op Evolution, Physical and Metaphysical 



V. — The Method of Creation of Organic Forms . 

 VI. — Review of the Modern Doctrine of Evolution 



PAGB 



1 

 41 



124 

 128 

 173 



215 



PART IL— STRUCTURAL EVIDENCE OF EVOLUTION. 



VII. — The Homologies and Origin of the Types op Molar Teeth of the 



Mammalia Educabilia 241 



VIII. — The Relation of Man to the Tertiary Mammalia . . . 268 



IX. — The Developmental Significance op Human Physiognomy . . 281 

 X. — The Evidence for Evolution in the History of the Extinct 



Mammalia 294 



XI. — The Evolution of the Vertebrata, Progressive and Retrogres- 

 sive 314 



PART IIL— MECHANICAL EVOLUTION. 



XII. — The Relation of Animal Motion to Animal Evolution . . 350 



XIII. — On the Trituberculate Tooth in the Mammalia .... 359 



XIV. — The Origin of the Specialized Teeth of the Carnivora . . 363 



XV. — The Origin of the Foot Structures of the Ungulates . . 368 



XVI. — The Effect of Impacts and Strains on the Feet of Mammalia . 373 



