Dec. 1, 1919 Parasitism of Pythium debar yanum on the Potato Tuber 297 



(24) PeircE, George J. 



1894. DAS EINDRINGEN VON WURZELN IN LEBENDIGE GEWEBE. In Bot. Ztg., 



Jahrg. 52, Abt. i, Heft 8-9, p. 169-176, i fig. 



(25) Stevens, Neil E., and Hawkins, Lon A. 



191 7. SOME CHANGES PRODUCED IN STRAWBERRY FRUITS BY RHIZOPUS NIGRI- 

 CANS. In Phytopathology, v. 7, no. 3, p. 178-184. Literature cited, 

 p. 184. 



(26) Ward, H. Marshall. 



1883. OBSERVATIONS ON THE GENUS PYTHIUM (pRiNGSH.). In Quart. Jour. 

 Micros. Sci., n. s., v. 23, no. 92, p. 4S5-515, pi. 34-36. 



(27) 



1888. A LILY-DISEASE. In Ann. Bot., v. 2, no. 7, p. 319-382, pi. 20-24 

 (partly col.). 



(28) 



1905. RECENT RESEARCHES ON THE PARASITISM OF FUNGI. In Ann. Bot., 



V. 19, no. 73, p. 1-54. Literatiu-e cited, p. 50-54. 



