Bui, 934, U. S. Dept. of Agriculture. 
Plate I 
Pythium debaryanum from Artificial Cultures. 
Fig. 1.— Hyphse, showing ©Id portions of hyphse and false septa separating them from the portions still 
containing protoplasm. Figs. 2 to 4.— Various stages of oospore formation. Figs. 5 to 8.— Hyphal 
swellings at points of contact with glass. From camera-lucida drawings. 
