337 



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

 tor a year have been found fa]>ahle of germination. 



Alicro-co nulla 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 

 3.6-G.3 X 7-14.5 microns. 



Fi^. 6. Spores. Germinated in water after a few hours. 



Fig. 7. Chlamjdospores produced in culture after tear months. Germinated in water alter a 

 few hours. 



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

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

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

 becoming rich in protoplasm and becoming delimited by transverse walls 

 to form the chlaraydospore. 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] 



