TABLE OF CONTENTS xi 



PACE 



Hymeniuin — Correlations and Fruit-body Efficiency— What Factor 

 determines the Oblique Position of the Opening of each Ascus ? — Experi- 

 mental Proof that a Fruit-body, when it puffs, produces a Blast of Air — 

 The Cause of the Blast of Air — The Blast of Air and the Dispersal of the 

 Spores — Concluding Remarks ........ 227 



CHAPTER II 



THE HELIOTROPISM OF THE ASCI AND THE DISCHARGE OF THE SPORES IN 

 ASCOBOLI, CILIARIA SCUTELLATA, ALEURIA VESICULOSA, THE MORCHEL- 

 LACEAE, AND OTHER DISCOMYCETES 



Introduction — The Heliotropism of the Asci of Ascobolus magnificus—Ascobolus 

 stercorarius — Our Present Knowledge of Ciliaria scutdlata — The Helio- 

 tropism of the Asci of Ciliaria scutellata — The Heliotropism of the Asci 

 of Melastiza miniata and Cheilymenia vinacea — Aleuria vesiculosa and its 

 Identification — Results of a Previous Investigation on Aleuria vesiculosa 

 — The Heliotropism of the Asci and the Discharge of the Spores in Aleuria 

 vesiculosa — Puffing of Aleuria vesiculosa under Natural Conditions — The 

 Heliotropism of the Asci and the Discharge of the Spores in Galactinia 

 badia — Urnula Craterium — Otidea onotica and O. leporina — The Helio- 

 tropism of the Asci and the Discharge of the Spores in the Morchellaceae 

 — The Helvellaceae — Concluding Remarks ...... 264 



CHAPTER III 



THE SOUND MADE BY FUNGUS GUNS AND A SIMPLE METHOD FOR 

 RENDERING AUDIBLE THE PUFFING OF DISCOMYCETES 



Fungus Projectiles— Type I : Sphaerobolus— Type II : Pilobolus— Type III : 

 Ascobolus— Type IV : Peziza— A Simple Method for Rendering Audible 

 the Puffing of Discomycetes — Tj-pe V : Empusa and Entomophthora, 

 Uredmeae and Hymenomycetes — Sounds Made by Fungus Guns are of 

 No Biological Significance .....•••• 325 



PART III 



PSEUDORHIZAE AND GEMMIFERS AS ORGANS OF CERTAIN 



HYMENOMYCETES 



CHAPTER I 



THE PSEUDORHIZA 



Introductory B.ema,rks—Collybia radicata—Mycena gakriculata—Coprtnus 

 ruacrorhizus .....•••••• 



347 



