PLATE 40 



Fig. 19. lUvularia mamiUata Setchell and Gardner. X 250. 



Fig. 20. DicJiothrix seriata Setchell and Gardner. X 125. 



Fig. 21. Calothrix rectangularis Setchell and Gardner. X 125. 



Fig. 22. Calothrix robusta Setchell and Gardner. X 125. 



Fig. 23. Flwrmid'mm hormoides Setchell and Gardner. X 500. 



Fig. 24. Microcoleus Weeksii Setchell and Gardner. X 500. 



Fig. 25. Microcoleus coufiuens Setchell and Gardner. X 500. 



[484 1 



