Explanation of Plate III. 



Phytophthora Meadii n. sp. on Hevea brasiliensis. 

 rigs. 1 — 6. Antheridia, oogonia and oospores, + 1,000. 

 •^'S- 7. Oogonia with oogonial wall folded, + 660. 



" ^ ) I + 750. 



» ^' [ Young oogonia and antheridia -| x 500 



^0-^ I X 75o! 



Figs. 11 — 19. Oogonia antheridia, x 600. 



