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elongates to form a new thread. Sometimes the cocci elongate 

 whilst still attached to the parent thread, with the result that the 

 latter assumes the appearance presented in Fig. 89. According to 



FIG. 88. Creuothrix polyspora. (After Zopf.) 



Garrett, who investigated the Cheltenham water, when this was 

 reddened by the multiplication of Crenothrix polyspora, the cocci 

 are capable of reproducing themselves in the same way as do the 

 cocci belonging to the Coccaceae, each dividing up to form daughter- 

 cocci. He considers that the species is maintained in this way, until 



