SILK-WORM DISEASE. 



355 



of ' mould, ' which finds upon it a most congenial soil ; and it keeps 

 up a continual supply of sporules, which, being diffused through 

 the atmosphere of the neighbourhood, are drawn into the breathing 



Fig. 167. 



Botrytis bassiana : — a, the fungus as it first appears at the 

 orifices of the stigmata; b, tubular filaments bearing short 

 branches, as seen two days afterwards ; e, magnified view of the 

 same ; c, d, appearance of filaments on the fourth and sixth 

 days ; f, masses of mature spores falling off the branches, with 

 filaments proceeding from them. 



A A 2 



