THE STRUCTURE OF BACTERIA. I? 



t f f f 



11 12 



Fig. 6. Pasteuria ramosa (after Metschnikoff). 



1-4. Stages of the longitudinal division showing the resulting 

 ray-like arrangement of cells. 



5-12. Formation of endospores (after drawings). Magnified 

 about i : 2000. 



it has been observed that during the course of 

 development straight rods sometimes undergo 

 a thickening in the middle of the cell, thus be- 

 coming spindle-shaped, or at the end, causing 

 a club-shaped appearance. In some cases 

 these enlarged bacilli seem to be forms especi- 

 ally concerned in the production of fermenta- 



