314 



INDEX 



Wood of Male Fern, 46 

 of Sclaginella, 10 



XYLEM. See Wood 

 YEAST, 261 



ZOOGLCEA, 274 



Zoospores of Ectocarpus, 186, 187 



of CEdoyonium, 151 



Zoospores of Pythium, 221, 227 



of Ulothrix, 160, 165 



of Faucheria, 176 



Zygomycetes, 228 



affinities of, 294 

 Zygospores, 164 



of Ectocarpus, 189 



of Pilobolus, 233 



of Spirogyra, 171 



of Ulothrix, 164 



Printed by MORRISON & GIBB LIMITED, Edinburgh 



