THE 



STRUCTURE & DEVELOPMENT 



OB' THE 



MOSSES & FERNS 



{ARCHEGONIA TyE) 



BY 



DOUGLAS HOUGHTON CAMPBELL, Ph.D. 



PROFESSOR OF BOTANY 

 IN THE LELANI) STANFORD JUNIOR UNIVERSITY 



Hontion 

 MACMILLAN AND CO. 



AND NEW YORK 

 1895 



All rights teset-i'ed 



