PROSPECTS FOR A NATURAL SYSTEM OF CLASSIFICATION OF BACTERIA 



Aerobacillns Donker, 1926. Emend. (!). 



Rod-shaped bacteria. Either immotile or motile by means of peritrichous 

 flagella. Endospores formed. Chemo-heterotrophic, oxidizing various organic 

 compounds, and capable of fermenting carbohydrates, 2,3-butylene glycol 

 and ethyl alcohol being the main products. Gram-positive. 

 The type species is Aerobacillus poly my xa (Prazmowski) Donker. 

 Zvmobacillus nov. gen. 



Rod-shaped bacteria. Either immotile or motile by means of peritrichous 

 flagella. Endospores formed. Chemo-heterotrophic, oxidizing various organic 

 compounds, and capable of fermenting carbohydrates, ethyl alcohol, acetic 

 acid and acetone being the main products. Gram-positive. 

 The type species is ^ymobacillus macerans (Schardinger). 

 Clostridium Prazmowski, 1880. 



Rod-shaped bacteria, sometimes occurring in chains. Either immotile or motile 

 by means of peritrichous flagella. Endospores formed, as a rule in typical Clostri- 

 dia or plectridia. Chemo-heterotrophic, anaerobic, fermenting carbohydrates 

 with the formation of butyric and acetic acid, sometimes also of butyl alcohol 

 and acetone. Gram-positive. 



The type species is Clostridium acetobutylicum Speakman. 

 Peptoclostridium Donker, 1926. 



Rod-shaped bacteria, sometimes occurring in chains. Either immotile or motile 

 by means of peritrichous flagella. Endospores formed, sometimes in typical 

 Clostridia or plectridia. Chemo-heterotrophic, anaerobic, capable of fer- 

 menting protein decomposition products with the formation of carbon dioxide, 

 hydrogen and other unknown products. Gram-positive. 

 The type species is Peptoclostridium putrificum (Bienstock) Donker. 



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