SYSTEMATIC AND DESCRIPTIVE. 



323 



FIG. 125. CRENOTHRIX KUHNIANA. 



a, b t c, d, f. Cocci in various stages of fission, X 600. 



/. Zoogloea of cocci, X 600. 



g. Various forms of zoogloea, natural size. 



h. Colony of threads composed of rods grown out of a zoogloea of cocci. 



i r. Thread-forms ; some straight, others spiral, with more or less differ- 

 entiation between base and apex, (r) is composed of short rods at the base 

 and above these of cylindrical segments, and at the apex these segments have 

 divided into cocci, X 600. [After Zopf.] 



