THE GENERA CRENOTHRIX AND CLADOTHRIX. 357 



have quitted the sheath of the parent thread ; and in this manner 

 tufted forms, similar to that shown in Fig. 66, are produced. 



FIG. 66. Crenothrix polyspora. 



Germination of^the cocci (g) within the sheath of the parent thread. 

 Magn. about 600. (After Zopf.) 



Otherwise, the sheath is gradually emptied of its contents, and 

 then collapses limply and withers up. 



