PLATE 39 



Soranthera ulvoidea f. typica S. and G. 



Fig. 40. Section through a sorus showing zoosporangia, paraphyses, and 

 hairs. X 250. 



Fig. 41. Section through a sorus. X 75. 



Fetrospongium rugosum (Okamura) S. and G. 



Fig. 42. A few filaments, pei-pendieular to the surface, showing method of 

 branching, character of the cells, rhizoidal filaments, and zoosporangia. X 125. 



Fig. 43. Habit sketch. X 0.5. 



Chordaria flagelliformis f. typica Kjellm. 



Fig. 44. Portion of a. section showing hairs, paraphyses, and characters of 

 the cells. X 250. 



Scytosiphon Lomentaria f. typicus S. and G. 



Fig. 45. Port'on of section with gametangia and one paraphysis (?). X 250. 



Sargassum Agardhianum Farlow 



Fig. 46. A segment of the frond sho\\'ing the character of a leaf, vesicles, 

 and receptacles. X 2.5. 



[750] 



