PLATE 42 

 Streblonema evagatum S. and G. 

 Figs. 1, 2, 4. Fragments of plants freed from their host. X 250. 

 Fig. 3. A diagrammatic section. 

 Fig. 5. A young plant penetrating among the sporangia of the host. X 125. 



PylaieUa unilateraJis S. and G. 



Fig. 6. Diagrammatic sketch of a small group of plants. 



Fig. 7. A filament showing method of branching and characteristic inter- 

 calary zoosporangia. X 125. 



Fig. 8. A small fragment showing longitudinal divisions of the cells of the 

 main filament in the region of branching. X 250. 



FylaicUa tenella S. and G. 



Fig. 9. A fragment of a filament showing gametangia, and a fragment to 

 the right of it showing ehromatophores. X 500. 



Fig. 10. A fragment showing zoosporangia. X 500. 



Fig. 11. A fragment showing seriate intercalary^ gametangia. X 125. 



[398] 



