244 



Plate II. 



Figure 1. Nunnuularia discreta on decorticated apple limbs. (Re- 

 duced.) 



Figure 2. Same uatural size. 



Figure 3. Same before the bark has fallen away. (Natural size.) 



Figure 4. Under side of a piece of bark showing white stains of tbe 

 fungus. (Natural size., 



