458 



INDEX 



117; root-structure of, 73, 74 

 (fig.) ; stem-structure of, 84-6 

 (figs.). 



Zingiber officinale, 63. 



Zonation of Seaweeds, 199, 200, 

 202, 203. 



Zone of elongation of root, 65. 



Zooglrea-stages (of Bacteria), 262. 



Zoosporangia of Algae ; 196 (fig.) ; 

 Fungi, 218 (fig.), 219 (fig.). 



Zoospores, 214, 219, 238. 



Zoospores of, Cladophora, 215 ; 

 Cystopus, 232, 233 (fig.) ; Ecto- 

 carpiis, 218, 219 (fig.) ; CEdo- 

 gonium, 216, 217 (fig.) ; Pleuro- 

 cocctts, 191 ; Saprolegnia, 235 

 (iig.), 236; Ulothrix, 213 (fig.), 

 214 ; Vaiicheria, 217, 218 

 (fig-). 



Zostera, pollen of, 361 ; stem- 

 structure of, 172. 



Zygnema, cell-structure of, 208 ; 



sexual reproduction of, 226-8 



(fig.). 



Zvgnema pectinatum, 227 (fig.). 



Zygomorphic flowers, 355, 373. 



Zygomycetes, 236-8 (fig.), 406. 



Zygospores, 186, 307 ; dispersal of, 

 186, 214, 228. 



Zygospores of, Chlamydomonas 

 (fig.), 186 ; Conjugatffi, 

 (fig.), 228 ; Desmids, 20- 

 228 ; Ectocarptis, 219 

 220 ; Mucor, 237 (fig.) 



220 ; mucor, 237 (ng.j 



Ulothrix, 213 (fig.), 214. 



Zygote, 184, 185 ''fipl t8 



i»5 

 227 



:09 (fig.), 

 (fig-), 

 238; 



(fig.), 214- 

 Zymase, 53, 57 



(fig 



213 



256. 



Printed hy Hazell, Watson & Viney, Lit.. London and Aylesbury. 



