PLATE 19 



Gomontia polyrhisa (Lagerli.) B. and F. 



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



X 175. 



Gomontia liabrorhisa S. and G. 



Fig. 2. A young thallus. X 375. 



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



Pseudnilvella consociata S. and G. 



Fig. 4. 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 codicoJa 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] 



