Plate 131 



Fig. 1. Lijnghya spirulinoides Gomont, x about 260 (redrawn 



from Gomont ) 



Fig. 2. Microcoleus vaginatus (Vauch. ) Gomont: portion of 



thallus, X 500 



Fig. 3. Microchaete spiralis Ackley, x about 325 (redrawn 



from Ackley ) 



Fig. 4. Anabaenopsis Elenkinii Miller, x about 1000 (redrawn 



from Miller) 



Fig. 5. Anahaena unispora Gardner, x 700 ( drawn from ma- 



terial collected in the Panama Canal ) 



Figs. 6, 6a. Schizothrix lacustris A. Braun: 6, habit, x about 700; 

 6a, apex, x 1500 



Figs. 7, 8. Schizothrix tinctoria Gomont: 7, x 1250; 8, x 625 



Fig. 9. Amphithrix janthina ( Mont. ) Bornet & Flahault, x 



about 750 ( redrawn from Bornet & Flahault ) 



Figs. 10, 11. Riviilaria haematites (D. C.) C. A. Agardh: 10, habit; 

 11, X 625 



Fig. 12. Calothrix Braunii Bornet & Flahault, x 500 



Fig. 13. Cylindrospermum minutissimum Collins, x 500 



Fig. 14. Cylindrospermum licheniforme (Bory) Kuetzing, x 500 



[922] 



