PLATE 46 



Coilodesme californica (Eupr.) Kjellm, 



Fig. 1. Surface view. X 250. 

 Fig. 2. Cross-section. X 250. 



Coilodesme corrugata S. and G. 

 Fig. 3. Surface view. X 250. 

 Fig. 4. Cross-section. X 250. 



Sargassum paniculatum J. Ag. 



Fig. 5. Segment showing the characters of the stem, leaves, receptacles, 

 and vesicles. X 1.5. 



Pelvetiopsis limitata f. typica Gardner 

 Fig. 6. Diagrammatic section through a conceptacle. Stained. 



Ectocarpus confervoides f. variabilis Saunders 

 Fig. 7. Hamulus showing gametangia and zoosporangia (?). X 250. 



[764] 



