108 



MICRO-ORGANISMS AND FERMENTATION. 



branched mycelium, from which buds are thrown out ; these 

 have a striking resemblance to ordinary yeast-cells (4), and 

 are able either to propagate through many generations by 



FIG. 25. 



Dematium pullulans, after Loew : 1, 2, full-grown mycelial threads with 

 yeast-like cells ; 3, cells of the latter kind developing to mycelial 

 threads ; 4, cells with yeast-like buds ; 5, appearance of yeast-like cells 

 on the germ tubes of the brown- walled cells. 



yeast-like budding, or to produce germinating threads, which 

 give rise to a mycelium (3). When this has attained a 

 certain age, it forms numerous closely-situated transverse 



