PLATE 45 

 Ectocarpus fructuosus S. and G. 



Fig. 1. Diagrammatic illustration of whole plant. 



Fig. 2. Part of a plant showing positions and various shapes and sizes of 

 the gametangia. X 175. 



Figs. 3, 4. Terminal ramuli showing variations in shape of cells and some- 

 what reduced gametangia. X 60. 



Ectocarpus Mesogloiae S. and G. 



Fig. 5. A single gametangium and a piece of terminal ramulus illustrating 

 chromatophores and cells. X 200. 



Fig. 6. A group of plants showing rhizoids, character of branching, relative 

 shapes and sizes of gametangia. X 40. 



Ectocarpus gramdosoides S. and G. 



Fig. 7. A group of terminal ramuli showing character of branching, shapes 

 of cells, positions and shapes of gametangia. X 125. 



Fig. 8. A few cells of the main filament showing the shapes of cells and 

 of chromatophores. X 125. 



Ectocarpus simulans S. and G. 



Fig. 9. Diagrammatic illustration of groups of plants on their host. 



Fig. 10. Parts of plants showing shapes and positions of gametangia. 

 X 125. 



Fig. 11. A group of cells of the main filament showing chromatophores. 

 X 250. 



[418] 



