﻿512 INDEX. 



Vocal sac, 9, 51 ; ligament, 21 

 Vorticdla, 359, 368 



W. 



WOOD, 446, 454, 463, 472 

 Wood-cells, 473 



X. 



Y. 



YEAST, 377388 

 Yellow-brown tissue, 242, 243, 2^ 



Z. 



ZONITES, 241, 248 



Zooglcea, 409, 412 

 Zoospores, 391, 393 



XlPHISTERNUM, 69 



Xylem, Bean, 463, 464, 473; Zygapophyses, 56 



Fern, 446, 448, 449, 454 Zygospore, Mucor, 423 ; Spiro- 



Xylem-parenchyma, 455 gyra, 401, 407 



<:A.\IHKIL>GE : PRINTED HV c. j. CLAY, M.A. AND SONS, AT THE UNIVERSITY PRESS. 



