Plate 72 



Figs. 1, 2. Mougcotia virescens ( Hass. ) Borge: 1, x 300; 2, x 700 



Figs. 3, 4. Spirogyra aequinoctialis G. S. West, x 375 



Figs. 5, 6. Spirogyra condensata ( Vauch. ) Kuetzing, x 275 



Figs. 7, 8. Spirogyra crassa Kuetzing, x 62 



Figs. 9-11. Spirogyra daedaleoides Czurda: 9, x 375; 10 and 11, 

 x600 



Fig. 12. Spirogyra ellipsospora Transeau, x 600 



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