CONTENTS. 



PART FIRST. 



CHAPTER I. 

 THE PAEASITIC FUNGI. 



PAGE 



§ 1. Definition of the Parasitism of Fungi, 2 



§ 2. Classification of Parasites and Saprophytes, 3 



§ 3. Mode op Life of the Parasitic Fungi, 7 



CHAPTER II. 



REACTION OF HOST TO PAEASITIC ATTACK. 



§ 4. Effect of Parasitic Fungi on their Host, 14 



§ 5. Effect op Parasitic Fungi on the Form of the Host-Plant, 22 



§ 6. Effect of Parasitic Fungi on Cell-Contents, - 31 



§ 7. Effect of Parasitic Fungi on the Cell- Wall, 36 



§ 8. Effect op Parasitic Fungi on the Tissues of their Host, 40 



CHAPTER III. 



RELATION OF PARASITE TO SUBSTRATUM. 



i 9. Effect of the Substratum on the Development of the 



Parasite, - 45 



