CONTENTS 



PAGE 



Preface \ 



Introduction \ i 



GENERAL PART 



CHAPTER I 



The Life-History of Puccinia Caricis, the Nettle and Sedge 



Bust 1 



CHAPTER II 



The Sexuality of the Uredinales — The nature of the 

 Spermatia — Nuclear division in the Uredinales — The 

 Alternation of Generations 17 



CHAPTER III 



Spore-forms of the Uredinales — Grouping according to Spore- 

 forms 30 



CHAPTER IV 



Life-Histories of other Uredinales — Puccinia graminis —P. 

 Poarum — P. Malvacearum — Otmnospora ngium CLA VAUI.K- 

 forme — Endophyllvm Sempervivi — Cronartium RIBICOLA 

 Melampsora pinitorqua — Calyptospora Goeppertiaka . . 41 



CHAPTER V 



Specialisation — Immunity 62 



CHAPTER VI 



Classification — Phylogeny .... 



Note on Manipulation ■ ■ 



