Contents. vii 



CHAPTER XI. 



PAGE 



The Evolution of Vegetals, . . .131 



Fungi, Algae, Cryptogams. Mechanism. Nervous Systems. 

 Parasitical Plants, Insectivorous Plants, Protophyta, 

 Functions of Plants. 



CHAPTER XII. 



The Causes of Vegetal Evolution, . . .156 



Sect. 1. Vegetal Substance. — 2. Cells. — 3. Structure. — 

 4. Energy.— 5. Form.— 6. Sex. — 7. Species. — 8. Life. — 

 9. Intelligence. — 10. The Aim and Purpose of Vegetal 

 Evolution. 



CHAPTER XIII. 



The Evolution of Animals, . . . . 1S1 



Protozoa, Molluscs, Corals, Plant-like Animals, Electric 

 Animals, Animals as Machines. 



CHAPTER XIV. 



Causes of Animal Evolution, .... 207 



1. Animal Substance. — 2. Cells and Unicellular Animals. 

 —3. Structure.— 4. Mechanism.— 5. Reproduction.— 

 6. Form. — 7. Energy and Life.— 8. Inter-relation of 

 Life and Death. — 9. Intelligence. 



CHAPTER XV. 

 The Evolution of Man, ..... 236 



1. Man's Substance. — 2. Origin. — 3. The Human Ovule. 

 — 4. Subjection of Organisms to their Environments. 

 — 5. Metamorphosis. — 6. Genital Centres and Causes 

 of Variation. — 7. Man's Embryological Development. 

 — 8. Summary of Man's Materialistic Evolution. 



