Plate 119 



Figs. 1-3. PAnabaena Viguieri Denis & Fremy, x 900 



Figs. 4-8. Anabaena wisconsinense Prescott, x 750 



Fig. 9. Nostoc carneum C. A. Agardh, x 900 (a form with 



especially elongate cells ) 



Figs. 10, 11. Nostoc caeruleum Lyngbye: 10, x 900; 11, habit, x % 



Fig. 12. Nostoc comminutum Kuetzing, x 750 



Fig. 13. Nostoc commune Vaucher, x 750 



Figs. 14-16. Nostoc Linckia (Roth) Bornet & Thuret: 14 and 15, 

 X 1125; 16, X 190 



[898 



