322 CHARLES T. BRUES AND RUDOLPH W. GLASER. 



PLATE II. 



6. Form of young colonies of symbiont after 72 hours incubation on potato 

 agar plate, viewed by reflected light. Magnified 5 diameters. 



7. Group of colonies of symbiont on nutrient agar after 10 days incuba- 

 tion. Magnified 4 diameters. Note small size of colonies and paucity of 

 processes. 



8. Group of colonies on the plate illustrated in figure 6, at same magnifi- 

 cation, viewed by transmitted light, to show internal structure and manner in 

 which radial processes develop. 



9. Development of mycelia in liquid culture of symbiont after prolonged 

 incubation of 10 days. Magnified about 60 diameters. 



