THE POTATO FUNGUS, PERONOSPORA INFESTANS. 
PLATE III. 
Resting spores germinating and reproducing the Peronospora, enlarged 400 
diameters, 
A.B.C.D. Oospores with germinating protoplasm coiled up within. 
E. Coil emerges. 
F.G. Coil sometimes expelled in its bladder before émerging. 
H.I.J. Thread emerges. 
K.L. Bladder sometimes left free, but broken. 
M.N. Thread still in connection with oogonium (rare). 
0.0.0. First mycelium, from which the Peronospora springs usually in a 
’ ¢ . 
terminal manner. 
