THIELAVI0PSI8 PARADOXA. 



545 



Air-dry spores exposed to sunlight survived exposure for 

 seven days, but were killed before the expiration of fourteen 

 days ; spores dried over calcium chloride and similarly exposed 

 were in some cases killed within twenty-one days, but some 

 survived for seventy days. 



Air-dry spores in semi-darkness survived for two hundred 

 and sixty-six days, but were dead at the end of tlu"ee hundred 

 and forty-five days. The experiment had unfortunately been 

 neglected for nearly three months, under pressure of other 

 work and through absence in field investigations. Spores 

 dried over calcium chloride survived in some cases for four 

 hundred and twenty-nine days, but none germinated after 

 fom- hundred and forty-one days. 



Lack of time has prevented farther experiments to determine 

 a closer limit for D, and to ascertain whether any spores 

 survive if they are dried in full sunlight. 



