TABLE OF CONTENTS 



TAtlE 



Preface ............. vii 



PART I 



THE BIOLOGY AND TAXONOMY OF PILOBOLUS 



CHAPTER I 



INTRODUCTORY AND HISTORICAL 



Pilobolus and its Subsporangial Swelling — The Discovery, Structure, Tax- 

 onomy, and Life-history of Pilobolus — Sex in the Pilobolidae — The 

 Cytology of Pilobolus — Crystalloids — The Orange-red Pigment- 

 Parasites of Pilobolus — The Excretion of Drops by the Sporangiophore and 

 its Cause — Premature Discharge of the Sporangia — Influence of External 

 Conditions on the Breadth of the Subsporangial Swelling — The Ballistics 

 of the Projectile — Pilobolus in its Relations with Light — The Effect of 

 Light on Fruit-body Development — The Heliotropic Response of the 

 Fruit- body to Light of Various Colours — Allen and Jolivette's Investiga- 

 tions — The Subsporangial Swelling as an Ocellus — The Solution of the 

 Problem of the Non-resultant Heliotropic Reaction of Pilobolus to Two 

 Beams of Light — The Discharge of the Sporangium .... 



CHAPTER II 



PILOBOLUS AND THE OCELLUS FUNCTION OF ITS SUBSPORANGIAL 



SWELLING 



Culture Methods — Germination of Spores, Growth of Mycelium, and Forma- 

 tion of Primordia of Fruit -bodies — A Colourless Sporangial Wall as an 

 Abnormality in Pilobolus longipes — Species observed — General Description 

 of the Pilobolus Gun and its Projectile — The Discharge of the Projectile — 

 Development of the Pilobolus Gun and its Projectile — The Heliotro{)ism 

 of the Pilobolus Gun demonstrated by a Simple Experiment — The Range 

 of the Pilobolus Gun — The Structure of the Sporangiophore and Spoian- 

 gium illustrated by Pilobolus Kleinii and P. lo?igipes — The Two Functions 

 of the Subsporangial Swelling — The Heliotropism of the Sporangiophore 

 with Special Reference to the Ocellus Function of the Subsporangial 



ix 



