SELECTED PAPERS 



5. Zymosarcina Smit, 1930. 



Spherical cells, generally occurring in regular packets. No endospores formed. 

 Chemo-heterotrophic, anaerobic, fermenting carbohydrates with the forma- 

 tion of ethyl alcohol and carbon dioxide. Gram-positive. 

 The type species is ^ymosarcina ventriculi (Goodsir) Smit. 



6. Butyrisarcina nov. gen. 



Spherical cells, generally occurring in regular packets. No endospores formed. 

 Chemo-heterotrophic, anaerobic, fermenting carbohydrates chiefly with the 

 formation of butyric and acetic acids, carbon dioxide and hydrogen. Gram- 

 positive. 

 The type species is Butyrisarcina maxima (Lindner). 



7. Pediococcus Balcke 1884. 



Spherical cells, generally occurring in tetrads. No endospores formed. Chemo- 

 heterotrophic, fermenting carbohydrates exclusively to lactic acid. Gram- 

 positive. 

 The type species is Pediococcus damnosus Claussen. 



8. Methanosarcina nov. gen. 



Spherical cells, generally occurring in regular packets. No endospores formed. 

 Chemo-heterotrophic, anaerobic, fermenting various organic substances with 

 the formation of methane. Gram-negative. 

 The type species is Methanosarcina methanica (Smit). 



VI. Tribe Sporosarcineae 



1. Sporosarcina Orla-Jensen, 1909. 



Spherical cells, generally occurring in regular tetrads or packets. Either 

 motile or immotile. Endospores are formed. Chemo-heterotrophic, oxidizing 

 various organic compounds. Gram-negative. 

 The type species is Sporosarcina ureae (Beijerinck). 



VII. Tribe Streptococceae 



1. Peptostreptococcus nov. gen. 



Spherical cells, generally occurring in chains. Immotile. No endospores formed. 

 Chemo-heterotrophic, anaerobic, capable of fermenting protein decomposition 

 products with the formation of carbon dioxide, hydrogen, and other unknown 

 products. Gram-positive. 

 The type species is Peptostreptococcus anaerobius (Kronig et Menge). 



2. Streptococcus Rosenbach, 1884. Emend. Orla-Jensen, 1919. 



Spherical cells, generally occurring in chains. As a rule immotile. No endospo- 

 res formed. Chemo-heterotrophic, fermenting carbohydrates with the practical- 

 ly exclusive formation of lactic acid. Gram-positive. 

 The type species is Streptococcus lactis (Lister) Lohnis. 



3. Betacoccus Orla-Jensen, 1919. 



Spherical cells, generally occurring in chains. Immotile. No endospores formed. 



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