GENERAL INDEX 



427 



Volutin, 23. 

 Volva, 363. 



WHEAT rust, loss due to, 219. 

 Witches' brooms, 204, 269. 



Xylaria, 280. 



Xylaria hypoxylon, 291. 



Xylindein, the green substance of 



Helotium aeruginosum, 168. 

 Xylindein, spectrum of, 168. 



ZINC sulphate, toxic effect of, 128. 

 Zodiomyceteae, 312. 

 Zoospores, ciliated, 61. 

 Zoospores, diplanetic, 61. 

 Zoospores, formation of, 60. 



Zoospores, formation of, dependent 

 on available amount of carbon, 

 130. 



Zoospores, formation of, by starva- 

 tion, 129. 



Zoospores, liberation of, 108. 



Zoospores, monoplanetic, 61. 



Zygodesmus, structure of, 349. 



Z,ygomycetes, 244. 



Zygophores, 82. 



Zygospore formation in Basidio- 

 bolus ranarum, 78. 



Zygospore formation in the Muco- 

 raceae, 79. 



Zygospores, formation of, 54. 



Zymase in Yeasts, 127. 



Zythia, 393. 



Printed by T. and A. CONSTABLE, Printers to His Majesty 

 at the Edinburgh University Press 



