Plate 31 



Figs. 1-3. Oedogonium globosum Nordstedt: 1, x 590; 2 and 3, 

 x300 



Fig. 4. Oedogonium Hirnii Gutwinski, x 590 



Figs. 5, 6. Oedogonium intermedium Wittrock: 5, x 270; 6, x 590 



Figs. 7, 7a. Oedogonium oviforme (Lewin) Him, x 590 



Figs. 8, 9. Oedogonium areolatum Lagerheim: 8, x 500; 9, x 275 



Figs. 10, 11. Oedogonium argenteum Hirn: 10, x 600; 11, x 590 



[722] 



