xii CONTENTS 



CHAPTER XIV 



THE NOCTURNAL SPORE-DISCHARGE OF PLEUROTUS OSTREATUS AND 

 COLLYBIA VELUTIPES AS OBSERVED WITH AN ELECTRIC HAND-LAMP 



PAGE 



The Electric Hand-lamp and its Employment in the Field — Pleurotus ostreatus 

 — The Effects of High and Low Temperatures — November and December 

 Field-observations — Collyhia vehUipes and its Activity in Mid-winter . 474 



PART II 



THE PRODUCTION AND LIBERATION OF BASIDIOSPORES 



IN THE UREDINEAE 



CHAPTER I 



THE PHENOMENA OF SPORE-DISCHARGE 



Upon the Identity of the Phenomena of Spore-discharge in the Hymeno- 

 mycetes and the Uredineae — The Discharge of Basidiospores in Puccinia 

 graminis — The Discharge of Basidiospores in Endophyllum Euphorbiae- 

 sylvaticae — The Discharge of Basidiospores in Gymnosporangium Juniperi- 

 virginianae — Models of Basidia ........ 497 



CHAPTER II 



THE TELEUTOSPORE AND THE CURVATURE OF THE BASIDIUM 



A Comparison of the Mechanism for the Production and Liberation of Basidio- 

 spores in the Uredineae and the Hymenomycetes — The Shape and 

 Position of the Basidia of Puccinia Malvacearum during Spore-discharge 522 



CHAPTER III 



SPORE WALLS AND SPORE DISPERSAL 



The Cell-walls of Basidiospores, Teleutospores, Uredospores, and Aecidiospores 

 — Compact and Loose Teleutospore-sori — Spore-wall Pores — The Number 

 of Uredospores and Aecidiospores of Puccinia graminis — The Violent 

 Discharge of Aecidiospores — The Dispersal of the Spores by the Wind . 540 



GENERAL SUAEMARY— 



Part I 567 



Part II 580 



GENERAL INDEX 585 



