PLATE 19 



Gomontia polyrhiza (Lagerh.) B. and F. 

 Fig. 1. A group of three "sporangia," the two larger nearing maturity. 

 X 17.3. 



Gomontia lixibrorliiza S. and G. 



Fig. 2. A young thallus. X 375. 



Fig. 3. a-e, Illustrating three forms of the "sporangia." 



Pseudulvella consoeiata S. and G. 



Fig. i. A surface view of a young thallus. X 375. 

 Fig. 5. A section of a mature thallus. X 375. 



Fig. 6. A vertical filament near the surface of a young thallus showing 

 branching. X 225. 



Entocladia codicola S. and G. 



Fig. 7. a, A young thallus, showing the method of branching of the fila- 

 ments and of their radiation from a center. X 125. b, A mature thallus with 

 sporangia in the center. X 125. 



Prasiola delicata S. and G. 

 Fig. 8. A surface view showing typical arrangement of cells. X 500. 



This plate is from Setchell and Gardner, Phyc. Cont. I, 1920, pp. 279-324 

 pi. 24. 



[346] 



