Plate 33 



Figs. 1-3. Oedogonium plusiosporum Wittrock, x 340 



Figs. 4, 5. Oedogonium suecicum Wittrock, x 590 



Figs. 6, 7. Oedogonium oviforme fa. gracile Prescott, x 590 



Fig. 8. Oedogonium patulum TiflFany, x 590 



Figs. 9, 10. Oedogonium urceolatum Nordstedt & Him: 9, x 127; 

 10, X 590 



Figs. 11, 12. Oedogonium carolinianum Tiffany: 11, x 500; 12, x 300 



[726] 



