nr. 



LIST OF WRITinCrS REFEPJ'^ED TO. 



BISCHOFF, G. IV., '28 : Dio kr^T)to.^aiaisclien Govr^chse, Nuren- 



Dur.^, 182r.. 

 BOWER, F. 0., '89 : Tlie Conparative Examination of tlie Meri- 



steniG or Ferns. Ann. Bot., vol. Ill, lSo9. 

 BRAUN, A., '70 : Ueber Marsilia imd Pilularia. Monatcb. Berl , 



Afed., 1870. 

 BUSG-EM, M. , '90 : Untersuchiin^'^en fiber normr^le imd abnomale 



Marsilienfrfichten. Flora, Bd. XLVIII, ISf'O. 

 CAI'.IPBELL, D. H., '87 : The development of Onoclea striitliiop- 

 feric. Men. Bosto: Soc. Nat. Hist., 1887. 



*88 : Tlie development of Pilularia globn- 

 lifera. Ann. Bot., vol. II, 1888. 



'93.1 : Tlie development of the sporocai-^ of 

 Pilularia Americaaia. Bull. Torrey Bot. Club, vol, 

 XX, 1803. 



'93.2- : Ori the development of Azolla 

 filiculoidea. Ai^n. Bot., vol. VII, 1893. 



'95 : The Structiu'e and Development of tlie 

 Mosses and Ferns. New York, 1895. 

 GOEBEL, K., '82 : Ueher die "Fruclit" vo]-i Pilularir. rlobu- 

 1 if era. Bot. Zeit. Bd. XL, 1^82. 



