Plate 118 



Figs. 1-3. Anabaena planctonica Brunnthaler: 1 and 2, x 900; 3, 

 xl500 



Figs. 4, 5. Anabaena spiroides var. crassa Lemmermann: 4, x 600; 

 5, X 900 



Figs. 6-8. Anabaena subcylindrica Borge: 6 and 7, x 600; 8, x 400 

 Figs. 9, 10. Anabaena variabilis Kuetzing: 9, x 750; 10, x 900 

 Figs. 11, 12. Anabaena verrucosa Boye-Petersen, x 900 



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