337 



spores frequently put out two germ tubes. Those kept in the laboratory 

 for a year have been found capable of germination. 



Micro-conidia have been found frequently in cultures. They are pro- 

 duced near the tips of young mycelial threads and will reproduce the 

 fungus when sown in pure culture. They are colorless and measure 

 8.G-6.3 X 7-14.5 microns. 



Fit. 6. Spores. Germinated in water after a tew hours. 



Fig. 7. Chlamydospores produced in culture after lour months. Germinated in water after a 

 few hours. 



ChJamydospores are also quite common (Fig. 7). The first notice 

 of these bodies was made in agar cultures alwut three months old. Their 

 formation seems to be brouglit about as a result of certain mycelial cells 

 becoming rich in protoplasm and becoming delimited by transverse walls 

 to form the chlamydospore, which later acquires a thick membrane. In 

 older cultures, oil drops have been seen in the chlamydospores. These 

 germinate readily in water (Fig 5). 



[22—29034] 



