34 



OUTLINES OF BACTERIOLOGY 



by moulds, such as Penicillium or Eurotium, they are capable of 

 germinating immediately after their formation. This is shown by the 

 fact that Leptothrix threads are sometimes seen with small threads 



Fig. 64.— Crenothrix polyspora. (After Zopf.) 



attached to them. These have resulted from the germination of the 

 conidia whilst still attached to the parent organism (Fig. 52). As 

 to their method of germination, in the case of Spirophyllum ferru- 

 gineum, the membrane of a conidium bursts open, then the contents 

 emerge and develop by growth into a new band. On the other hand. 



