Plate 18 



Figs. 1, 2. Coleochaete Nitellarum Jost: 1, habit on Nitella; 2, 

 oogonium, x 440 



Figs. 3-5. Coleochaete orbicularis Pringsheim: 3 and 4, x 440; 

 5, habit on grass, x about 20 



Fig. 6. Coleochaete soluta ( de Breb. ) Pringsheim, x 500 



Figs. 7, 8. Coleochaete pulvinata A. Braun, x 220 



Fig. 9. Coleochaete scutata de Brebisson, x 75 



Figs. 10, 11. Coleochaete soluta (de Breb.) Pringsheim: oogonia, 

 xlOO 



[696] 



