Plate XVI. Fig. 1.— Various Forms of the Sweet Corn Bacim.us 

 Grown on Potato Agar; u and 6 are Tyi-h'al Forms. Magnifica- 

 tion, 1,875 Diameters. 



Fig. 2.— Petri-dish Culture of the Sweet Corn Up 

 Showing p:ffect of Exposure to Sunlight. 



