Figs. 1, 2. 

 Figs. 3, 4. 

 Figs. 5, 6. 

 Figs. 7, 8. 



Figs. 9-11. 

 Figs. 12-14. 



Figs. 15-17. 

 Fig. 18. 



Plate 29 



Oedogonium angustum ( Hirn ) TiflFany, x 312 



Oedogonium anomalum Hirn: 3, x 180; 4, x 375 



Oedogonium capilliforme var. australe Wittrock, x 375 



Oedogonium cardiacum (Hass.) Wittrock: 7, x 220; 

 8, X 440 



Oedogonium diversum ( Hirn ) TifFany, x 250 



Oedogonium gracilius (Wittr. ) Tiffany: 12, x 625; 13 

 and 14, x 325 



Oedogonium grande Kuetzing, x 275 



Oedogonium grande var. aequatoriale Wittrock, x 300 



1718] 



