TABLE OF CONTENTS xiii 



PAGE 



Basidiospores in Dry Air — The Germination of Basidiospores — The 

 Development of Chlamydospores in Culture Media — Spore-fall observed 

 by the Beam-of-light Method — The Distance- of Basidiospore-discharge— 

 The Spore-fall Method of Inoculating Wheat Seedlings — The Infection of 

 Wheat Seedlings by Secondary Basidiospores of Tilktia tritici and T. bu ■■< is 

 — The Swelling of Bunted Wheat Grains in Water — The Reactions of the 

 Promycelium to External Stimuli — The Phenomenon of Protoplasmic 

 Migration — Conclusion ......... 207 



CHAPTER III 



THE SPHAEROBOLUS GUN AND ITS RANGE 



Introduction — The Species of Sphaerobolus — Cultures — The Germination uf 

 the Gemmae and of the Spores and the Diploid Nature of the Germ -tubes— 

 The Projectile — The Structure and Mechanism of the Gun — The Range of 

 the Gun — The Range of Sphaerobolus stellatus of Kenora Origin — Miss 

 Walker's Observations on the Range of Various Sphaeroboli — An Artificial 

 Method for causing a Sphaerobolus Gun to discharge its Projectile — The 

 Horizontal Range of Sphaerobolus stellatus of Winnipeg Origin — Summary 

 of Observations on the Range of Sphaerobolus Guns — The Horizontal 

 Range of Various Fungus Guns and of Expulsive Fruits — The Kinetics of 

 the Sphaerobolus Gun — Relations of Sphaerobolus with Water — Relations 

 of Sphaerobolus with Light — Sphaerobolus as a Coprophilous Fungus dis- 

 persed by Herbivorous Animals — Pilobolus, Ascobolus immersus, and 

 Sphaerobolus as Three Fungi with Parallel Adaptations for a Coprophilous 

 Mode of Life — Sphaerobolus as a Member of the More Specialised of Two 

 Groups of Coprophilous Fungi — Sphaerobolus as a Lignicolous Fungus 

 and the Problem of its Mode of Infecting W T ood ..... 279 



GENERAL SUMMARY ? 



Part I ........... 371 



Part II 377 



GENERAL INDEX 385 



