PLATE XIII. 



Fig. I. Cross section of leaf of Seiaria Germanica, parasitized by 

 Pi7-icularia grisea. Magnified in diameters. Setaria Germanica is 

 referred to in the text, by oversight, as Panicum sanguinale. 



Fig. 2. Cross section of leaf sheath of Zea-Mays, parasitized by 

 Ustilago ZecB-Mays. Magnified i6 diameters. 



