INVOLUTION FORMS. 



37 



outline, but frequently exhibit the most surprising shapes ; gene- 

 rally they are strongly bulged and distended, as can be seen in 

 the examples given in Fig. 6. The faculty of forming spores is 



FlG. 6. Involution Forms. 



A, of Lactic acid bacteria, after Maddox. 



B, of Clostridium Polymyxa, after Prazmowski. 



C, of Bacterium Zopfli, after Kurth. 



D, of Bacillus subtilis, and 



E, of Bacillus anthracis, after H. Buchner. 



F, of Vibrio rugula, after Warming. 



no longer one of their attributes, and they must be regarded as 

 a diseased condition preceding dissolution. In the following 

 pages frequent occasions will arise of calling attention to similar 

 degeneration forms. 



