SACCHAROMYCODES. 



375 



their power of forming spores when they remained for some 

 time on one and the same substratum. Other cells largely 

 lose this power, and the remainder do not appear to be in- 

 fluenced. By cultivation in favourable liquids the first set 

 of cells again yield spores. Beijerinck found that the colonies 



Fig. 82. Saccharomycet Ludurigii.QM film and mycelium (after Hanseu). 



formed from asporogenous cells do not liquefy gelatine, which 

 is contrary to what occurs with the sporogenous colonies. 



Guilliermond, who also examined the germination of spores, 

 records amongst other facts that spores which are not derived 



