xii TABLE OF CONTENTS 



FAOE 



Remark on the Pileus-flesh of Coprinus comatus — A Giant Fruit-body 

 of Coprinus comatus — Excretion of Drops of Water from a Pileus of 

 Coprinus niveus — Coprinus lagopus growing on Beet Seeds ... 63 



CHAPTER IV 



THE GERMINATION OF THE SPORES OF COPRINUS STERQUILINUS AND OF 

 OTHER COPROPHILOUS COPRINI 



Coprinus sterquilinus and its Spores — In Nature, Spores of Coprinus 

 sterquilinus which Infect Horse Dung have all been previously Swallowed 

 by Horses — Presence of Bacteria Not Required for the Germination of 

 the Spores of Coprinus sterquilinus — High Temperature Not Required for 

 Germination — Germination of Spores immediately after their Discharge 

 —Possible Effect of Bacteria on Germination— The Struggle for the 

 Substratum — Remarks on the Germination of the Spores of other Coprini 78 



CHAPTER V 



AN ANALYSIS OF THE FACTORS CONCERNED IN THE MECHANICAL FIXATION 

 OF THE FRUIT-BODY OF COPRINUS STERQUILINUS IN ITS SUBSTRATUM 



Introduction — Fruit-body Fixation in certain Polyporaceae and Agaricineae 

 — Coprinus sterquilinus — The Mycelium at the Surface of the Substratum 

 —The Mycelial Strands within the Substratum— The Rudiments of 

 Fruit-bodies— Light inhibits the Growth of Rudimentary Fruit-bodies 

 — The Morphogenic Effect of Light on Developing Fruit-bodies — The 

 Relations of the Fruit-body with Gravity— The Upward Pressure of the 

 Stipe — The Heliotropic Effect of Light — The Mechanical Fixation of the 

 Fruit-body — Conclusion .......•• 92 



PART II 



SOCIAL ORCxANISATION AND SEX IN THE HYMENOMYCETES 



CHAPTER I 



SOCIAL ORGANISATION IN COPRINUS STERQUILINUS AND OTHER FUNGI 



Social Organisation in Animals and Plants— The Algae— The Myxobac- 

 teriaceae— The Acrasieae— The Mycetozoa— The Pbycomycet«s— The 

 Hymenomycetes— Hyphal Fusions and Clamp-connexions in the 

 Hymenomycetes — Social Organisation in Coprinus sterquilinus — Social 

 Organisation in Other Hymenomycetes— Social Organisation in Other 

 Fungi— The Various Functions of Hyphal Fusions in the Hymenomycetes 

 — Sex and Hyphal Fusions in the Hymenomycetes . . . .139 



