PLATE 37 

 Eadaisia epiphytica Setchell and Gardner 



Fig. 10. A portion of the basal layer of a plant, as seen from above, showing 

 a few rows of cells one layer deep at the right and beginning to develop erect 

 filaments at the left. X 250. 



Fig. 11. A few erect filaments showing complex gonidangia at the outer 

 ends. X 250. 



Eadaisia subimmersa Setchell and Gardner 



Fig. 12. A section through the host perpendicular to the flat surface, showing 

 various stages of development of Eadaisia on the surface at the left, and variously 

 embedded groups to the right. X 250. 



Fig. 13. Various stages in the development of the basal layer. X 250. 



Eadaisia laminariae Setchell and Gardner 

 Fig. 14. A feAv highly magnified erect filaments, three of them bearing 

 terminal gonidangia. X 500. 



Fig. 15. The same as figure 14, but less magnified, showing the margin of 

 the colony at the left. X 250. 



Fig. 16. A portion of the basal layer showing the method of its development. 

 X 375. 



Eadaisia clavata Setchell and Gardner 



Fig. 17. A perpendicular section through a plant showing the character of 

 the erect filaments and one gonidangium. X 250. 

 Fig. 18. A portion of the basal layer. X 250. 



Hyella littorinae Setchell and Gardner 



Fig. 19. Showing a few forms assumed by the erect filaments, the upper 

 portions representing the outer ends. X 250. 



Fig. 20. A few groups of cells as seen from above, representing the outer 

 ends of the filaments. X 250. 



Dermocarpa liemispherica Setchell and Gardner 

 Fig. 21. Showing one cell in the lower left-hand corner representing tlie 

 vegetative condition, and the others in various stages of gonidia formation. 

 X 500. 



Dermocarpa pacifica Setchell and Gardner 



Fig. 22. A group of cells at the cross wall of the host, a common Avedge- 

 shaped form. X 250. 



Fig. 23. A group of spherical gonidangia. X 250. 



Fig. 24. A group of vegetative cells from the dead portion of the host. 

 X 250. 



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