FOOT-NOTES TO EVOLUTION. 



tures in man. Gill slits in man. Objections to the the- 

 ory of descent. Relation of present heredity to past 

 environment. Darwin's hope. The species of eel. The 

 reality of species. The old idea of species has passed 

 away. The acceptance of the theory of descent. The 

 philosophy of evolution. Influence of theory of de- 

 scent. Origin of man. Meaning of homology. Decay- 

 ing scientific beliefs. Darwin's words. The conception 

 of God. Darwin's home. Boyesen on evolution. 



II. EVOLUTION : WHAT IT is AND WHAT IT is NOT . 54 



What evolution is. The science of organic evolution or 

 bionomics. Meaning of law. Soundness and solvency 

 of Nature. The indifference of Nature. Evolution as a 

 theory of organic development. Each fact has a mean- 

 ing. Evolution as a method of study. Evolution as a 

 system of cosmic philosophy. Decay of formulae. What 

 evolution is not. Man not a developed monkey. Not 

 progress, but adaptation. Humanity not the goal of evo- 

 lution. Change by slow divergence. No innate tend- 

 ency toward progression. Spontaneous generation. 

 Evolution not a creed. Evolution not a religion. Sci- 

 ence its own witness. 



III. THE ELEMENTS OF ORGANIC EVOLUTION . . 75 



Heredity. Irritability. Individuality. Natural selec- 

 tion. Concessions of life. Self-activity. Altruism. Iso- 

 lation. Nutrition in transmission. Survival of the exist- 

 ing. Inheritance of acquired characters. The unknown 

 factors. 



IV. THE FACTORS OF EVOLUTION FROM THE STAND- 

 POINT OF EMBRYOLOGY. By Professor Edwin 

 Grant Conklin 100 



Embryology shows the method of evolution. Statement 

 of propositions. Causes of development. Intrinsic causes 

 dependent on nature of protoplasm. Inherited charac- 

 ters predetermined in structure of germ cell. Germinal 



