A. —Vegetable marrow squash and pattypan squash 60 hours after inoculation at three 
points with pure culture of Washington strain of Pythium aphanidermatum isolated 
from diseased cucumber. X H 
B. —Three pattypan squashes 72 hours after inoculation with strain of P. aphanidermatum 
isolated from diseased cucumbers at Chicago, 1924. The profuse cottony mycelium 
in the lower part of figure has completely invested the two younger and more tender 
specimens. X M 
