SEXUAL REPRODUCTION OF PEEONOSPORA INFESTANS. 341 



Fig. 4. 



The reating-spore of the Potato Fungus (A) embedded amongst the leaf-cell^ 

 (X 250). B. Antheridim. CO. Oogonia. E. Se-ni-mature resting-spore, with 

 y)ollinodiuni attached ; half washed out of cellulose covering (x 400). 1), 

 Mature ditto. (Gard. Chron., p. 101 ) 



