68 



MICRO-ORGANISMS AND FERMENTATION. 



Hueppe has likewise described a species, which was found 

 in milk, and occurred in the same forms as the species 

 discovered by Prazmowski, but was much less sensitive 

 towards oxygen, and must therefore be classed with the 



A 



FIG. 13. 



Clostridiunf butyricum Prazm., after Prazmowski : A, vegetative state ; c, short 

 rods ; d, long rods ; at a and b, rods and filaments curved like vibriones ; 

 , formation of " resting-spores " (Dauersporen) ; b, d, rods, previous to, 

 c, e, during, /, g, h, after the formation of resting-spores ; c, of an 

 elliptical ; d and h, of a lemon-like ; e, g, of a spindle-like ; /, of a 

 tadpole-like shape ; at a, rods still in their vegetative state ; (7, germina- 

 tion of resting-spores : the spore a expands into b ; c shows the 

 differentiation of the membrane into exo- and endosporium. The con- 

 tents surrounded by the endosporium issue from the polar fissure of 

 the spore in the form of a short rod (d), which appears prolonged at e. 



