THE POTATO FUNGUS, PERONOSPORA INFESTANS. 
PLATE II. 
Germinating resting spores, enlarged 400 diameters. 
§.8. Oospore throwing out threads of mycelium similar to average Peronos- 
pora infestans threads. 
T.U.V. Similar characteristic examples. V shows two septa. 
W. Oospore germinating with antheridium (A) attached to Oogonium, and 
still upon its last year’s thread. 
X. Germinating oospore showing first septum. 
{ . . . . 
Y. Two germinating oospore with thread from one oogonium, each thread 
showing first septum. 
Z. Shows threc .cpta (specimen submitted to Rev. M. J. Berkeley.) 
