PLATE 3 



Badaisia ei)iphytica S. and G. 

 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. 



Badaisia suhimmersa S. and G. 



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

 various stages of development of Badaisia 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. 



Badaisia Laminariae S. and G. 

 Fig. 14. A few highly magnified erect filaments, three of them bearing ter- 

 minal 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. 



Badaisia clavata S. and G. 



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 S. and G. 



Fig. 19. Showing a few forms assimied by the erect filaments, the upper por- 

 tions 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 Jiemisphaerica S. and G. 



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

 vegetative condition, and the other in various stages of gonidia formation X 500. 



Dermocarpa padfioa S. and G. 



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

 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. 



This plat« is a reprint of Gardner, Univ. Calif. Publ. Bot., vol. 6, p. 454, 

 pi. 37, 1918. 



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