TABLE OF CONTENTS 



PAGE 



Swelling — The Mechanism of Heliotropic Response in Pilobolus and in 

 the Leaves of Certain Flowering Plants — The Ocellus of Pilobolus and the 

 Eye-spots of Volvox — The Ocellus of Pilobolus and the Human Eye — A 

 Heliotropic Experiment made on Pilobolus longipes — A Solution of the 

 Problem of the Reaction of the Sporangiophore of Pilobolus to Two 

 Equal Beams of White Light— A Model for illustrating the Pilobolus 

 Fruit-body in its Relations with Light — The Periodicity in the Develop- 

 ment of Pilobolus Fruit-bodies — The Subsporangial Swelling and the Dis- 

 charge of the Pilobolus Gun— The Osmotic Pressure of the Cell-sap of 

 Pilobolus— Factors in the Efficient Working of the Pilobolus Gun— An 

 Analysis of the Cell-sap of Pilobolus longipes— The Landing of the Pilobolus 

 Projectile and the Attachment of the Sporangium to Herbage — The 

 Relations of Pilobolus w ith Flowering Plants and with Herbivorous Animals 47 



CHAPTER III 



PILOBOLUS UMBONATUS, A NEW SPECIES, WITH REMARKS ON THE 



PILOBOLIDAE 



Introduction — General Description— Taxonomic Description and Latin 



Diagnosis — Remarks on the Pilobolidae . . . . • .169 



CHAPTER IV 



A SYSTEMATIC ACCOUNT AND ARRANGEMENT OF THE PILOBOLIDAE 



Contributed by W. B. Grove 



Introductory Remarks— Historical Account — Systematic Arrangement- 

 Bibliography .......••• 



PART II 



THE PRODUCTION AND LIBERATION OF SPORES IN THE 



DISCOMYCETES 



CHAPTER I 



THE PHENOMENON OF PUFFING IN SARCOSCYPHA PROTRACTA AND 



OTHER DISCOMYCETES 



Introduction— Historical Remarks— Puffing illustrated by Photography— 

 The Significance of Puffing— The Genus ^a,Tcoscy^h?i—8arcoscyp}ui 

 protracta — The Perennial Pseudorhiza — The Direction of Puffing and the 

 Campanulat« Form of the Apothecium— The Ascus as an Explosive 

 Mechanism— Radial- longitudinal Sections and Surface Views of the 



190 



