ANALYSIS OF CONTENTS. 



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I. THE KINSHIP OF LIFE I 



What is the cause of variety in life ? What is a species ? 

 The number of species. The unity of type. Unity in 

 variety. The meaning of homology. The origin of va- 

 riety and the origin of homology. The origin of life un- 

 known. The answer of Linnaeus. The answer of Cuvier. 

 The answer of Lamarck. The answer of Agassiz. What 

 is special creation ? All life from life. Uncertain bound- 

 aries of species. The species of fishes of North Amer- 

 ica. The species of the Galapagos. Do species change 

 with space ? The species of South American edentates. 

 Do species change with time? Darwin's answer. Dar- 

 win's method. The origin of species. The Darwinian 

 theory. Artificial selection. Natural selection. The 

 struggle for existence. Relation of bees to clover. Re- 

 lation of cats to England's greatness. The equilibrium 

 of Nature. More organisms born than can mature. 

 How the hare becomes white. How selection becomes 

 adaptation. Acceleration of development. How bisex- 

 ual parentage brings variety. " Vom Vater hab' ich die 

 Statur." The value of death. The saving of time. Al- 

 truism and its struggle for existence. Every fact has a 

 meaning. Geographical distribution. Survival of the 

 existing. Geological distribution. Epoch-making events. 

 Change not progress. Vestigial organs. The pineal eye. 

 Origin of complex structures. The individual repeats 

 the history of the race. Embryology and evolution (John 

 Sterling Kingsley). Similarity of early stages in embry- 

 onic life. The egg of the mammal. Embryonic struc- 



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