The Structure and Development 



:; : ; : ;" v ';- : , O f 



Mosses and Ferns 



( Archegoniatae ) 



BY 



DOUGLAS HOUGHTON CAMPBELL, PH.D. 



PROFESSOR OF BOTANY 



IN THE 



LELAND STANFORD JUNIOR UNIVERSITY 



Sotfc 



THE MACMILLAN COMPANY 

 LONDON: MACMILLAN & Co., LTD. 



All rights reserved 



