PLATE 51 



(From IMycologia 4: PI. 6.^. 1912.) 



Thraustotheca clavata 



Fig. I. Tip of a main hyiiha showing the gnarled condition of the secondary hyphae. X 



Fig. 2. Main hypha showing sporangia and method of growth. X 155. 



Fig. 3. Spores encysted within the thin-walled sporangium. X 700. 



Fig. 4. Spores falling apart, the basal ring remaining. X 700. 



Fig. 5. An unusually large basal cup with a few spores still remaining in it. X 700. 



Fig. 6. Oogonium containing fully ripe eggs. Empty antheridia attached to the wall of 

 the oogonium. X 700. 



Fig. 7. Young oogonium with antheridium full of protoplasm. X 700. 



Fig. 8. Showing double branching below the sporangia; antheridial branches; and proli- 

 ferating oogonia. X 700. 



Fig. Q. A proliferating oogonium. X 700. 



Fig. 10. Oogonium with maturing eggs. X 700. 



