PLATE XXIII. 











202 

Tier aly 50 MICRONS 

Figs. 202 and 203. Oedogonium crassum (Hass.) Wittr 
Figs. 204 and 205. Oe. crassum f. amplum (M. & W.) Hirn. (Redrawn from 
Flamer) estrone: Cele astsn wes Shon 6 seks, ae ee EEE EE oe 88 
Figs. 206 and 207. Oe. crassum v. subtumidum Hirn. (Redrawn from Hirn).. 88 
ho 
i 
to 
