PLATE 53 

 (Drawn by Dr. A. J. Pieters) 



ACHLYA POLYANDRA 



Figs. 1-4. Oogonia with antheridia. 



Fig. 5. Unusual form of oogonium with spines. No. 4 from Ann Arbor, Michigan; others 

 from Heidelberg, Germany. 



DicTYUCHUs Magnusii 



Fig. 6. Oogonium with nearly mature egg. X 525. 



Fig. 7. Sporangia. 



Figs. 8-9. Oogonia with antheridia and young eggs. X 525- 



Fig. 10. Oogonium without antheridia. X 525. 



Figs. 11-13. Sporangia. .\11 from Ann Arbor, Michigan. 



