Arthur 8. Horn*: and Eleanor Violet Horne 197 



developed was carried on in plate culture and eventually yielded either 

 Pleospora or Polyopeus purpureus, or both. On Sept. 20th, some more 



Fig. 5. Conidial stage of Pleospora pomorum (Stemphylium). 



(a) Portion of conidiophore. 



(b) Sporophore showing swollen end-cells (e) and mature conidia (•"). 



cubes were cut and dropped on the surface of apple agar in slant tubes. 

 On this occasion abundant conidia (Stemphylium) were produced within 

 four days, but no Polyopeus. On Sept. 26th masses of white mycelium 



