PLATE 30 



ACHLYA HYPOGYNA 



Fig. I. Gemmae and sporangium. X 167. 

 Fig. 2. Gemmae. X 247. 



Fig. 3. Two empty sporangia, one withi an internal proliferation that is bearing an oogo- 

 nium on its tip which is just outside the sporangium. X 247. 

 Fig. 4. A small oogonium with two fertilizing tubes. X 247. 

 Fig. 5. Habit of sporangia. X 167. 

 Fig. 6. Oogonium with a hypogynous antheridium and another of more distant origin. 



X 447- 

 Fig. 7. Small immature oogonium covered with long papillae. X 447- 

 Fig. 8. Oogonium with hypogynous and lateral antheridia. X 247. 

 Fig. Q. Oogonium with an intercalary basal antheridium. X 447- 

 Fig. 10. Intercalary oogonium without antheridia but with a thick-walled ingrowth from 



one end. X 247. 

 Fig. II. An oogonium with ripe eggs, and showing a hypogynous antheridium with a lateral 



branch: also antheridia of more distant origin. One of the latter with its 



fertilizing tubes pulled out by tension in mounting. X 447- 

 Fig. 12. Oogonium with a stout papilla. X 447- 

 Fig. 13. A typical oogonium and antheridium. X 447. 



