ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 757 



They regard as constant organisms : Enterococcas (Eschericb), B. coli, 

 B. acidi paralactici, B. subtilis, B. mescntcricus, B. fcBcalis alcaligenes, 

 B. lactopropylbutyricas, and Oidium lactis. 



Lactic acid fermentation was found to be caused by Enterococcas, 

 B. coli and B. acidi paralactici ; Enterococcus produced also valerianic 

 and acetic acids. Butyric acid fermentation was found to be caused by 

 JB. lactopropylbutyricus alone, which produced also propionic acid. 



