332 DISEASES OF FIELD & GARDEN CROPS. [CH. 



FIG. 139. FOSSIL PARASITIC FUNGUS. 



Peronosporites antiquarius, W.Sm., in a slice of fossil Lepidodendron from 

 the Coal Measures. Enlarged 400 diameters. 



potato disease being one of the Saprolegniece (Journal of 

 the Royal Agricultural Society, p. 249, 1876). It is some- 



