10 



ascogonium, is a corkscrew-like end of a branch 

 of the mycelium, the coils of which gradually become 

 closer, and when actually in contact they form a 

 hollow spiral. Duiing this process there are as 

 many septa formed as there are turns of the 

 spiral. 



From the lowest coil of the ascogonium two 

 slender branches now shoot out at opposite points, 

 and grow upwards on the outside of the spiral {helix) 

 one of these develops more quickly than the other, 

 reaches the uppermost coil, and becomes closely 

 attached to it by its apex. 'J.^his branch is the 

 polUnodium. 



Conjugation takes place between its apex and 

 that of the ascogonium, the cell walls being absorbed 

 at the point of contact, the protoplasmic contents of 

 the two cells commingle. Soon afterwards new 

 filaments sprout out from the lower part of the 

 pollinodiam and ascogonium, cling closely to the 

 spiral and finally envelop it. From these filaments 

 a layer of polygonal cells is formed by numerous 

 transverse divisions. 



The cells of the enveloping layer grow inwards as 

 jDapillfe, which become septate. 



The enveloping layer increases in size, the cavity 

 between it and the ascogonium also enlarges, the 

 coils of the ascogonium loosen. The whole space 

 becomes filled up by the papillae, which become 



