PLATE XV. 



















Figs. 143 and 144. Oedogonium zigzag Cleve. 
Big. 1452, s@ermrapilewwiittr. 0 5... 5 jueves ae bide ck ae tie Teena ee 
Fig. 146. Oe. fragile v. robustum (W. and W.) Tiffany. 
NVIGSIC) eerie eet, Bes so, «ahs cla a renin « Ue Renee oe 
Fig. 147. Oe. fragile v. abyssinicum Hirn. (Redrawn from Lelio) een aay caees ths) 
Fig. 148. Oe. warmingianum Wittr. (Redrawn from Hirn)...................169 
Fig. 149. Oe. curtum Wittr. and Lund. (Redrawn from lim) ia Sepckein ee 74 
Figs. 150 and 151." ‘Oefvaucherii (Le'Cl.) A. Br? Witte). 2. GG 
204 


