PLATE XLII. 





Page 
Fig. 407. Oedogonium undulatum (Breb.) Al. Br.; Wittr. (Redrawn from 
Le bia) Jess Be Oe become tos Gin oc Hod ob. oo hb OkeRE Oley Ob: og eg Ee ea 118 
Ee 40550 Oe. undulatumiy, americanumidirans 26. sees. ase). se eee ee 119 
Fig. 409. Oe. undulatum f. senegalense (Nord.) Hirn.........................119 
Figs. 410-413. Oe. nebraskense Ohashi (slightly on larger scale)............ 119 
231 



