

THE 

 ZYGNEMATACEAE 



(FRESH-WATER CONJUGATE ALGAE) 



With Keys 



for the Identification of Genera and Species 



and 



Seven Hundred Eighty-Nine Illustrations 



By 

 Edgar Nelson Transeau 



Emeritus Pro]essor of Botany 

 The Ohio State University 



vGVWi 



.^X 





THE OHIO STATE UNIVERSITY PRESS 



Columbus 



1951 



