138 AGKICULTURAL EXPERIMENT STATION. [Jan. 



-cS 



Fig. 3. 



Fig. 3. a. Cell from diseased root of cabba2;e, showing' renting stacre 

 of Pla.'^niodiojihin'a Brassiccie, Woronin, tlie "ehib-foot" 

 parasite. 



b. Protoplasmic masses of P. brassicae emerging from the 



resting state. 



c. Cell from scabby potato, showing resting stage of Sjio?i(/o- 



sporaSolani, Brunchorst,th.Q supposed "st-ab" ])arasite. 

 a and b, after Woronin. a magnitied one hundred diameters, 



b magnified six hundred diameters, 

 c, after Brunchorst. Magnified one thousand diameters. 



