SELECTED PAPERS 



It is only self-evident that in a number of cases we have been 

 obliged to establish new genera. The name Desulfovibrio for the sulfate 

 reducing bacteria first described by Beijerinck and Van Delden needs 

 no further comment. Zymomonas has been chosen as a suitable name 

 for polarly flagellated bacteria causing alcoholic fermentation like 

 Pseudomonas lindneri [Termobacterium mobile Lindner), Aeromonas for 

 similar organisms which ferment sugars in a way probably closely 

 related to the fermentation type characteristic of the genera Aerobacter 

 and Aerobacillus. The genus Methanobacterium has been created for the 

 methane producing rod-shaped bacteria described by Sohngen [1906]. 

 Similarly Methanosarcina is a new generic name for the related sarcina, 

 Methanococcus for the small spherical forms causing this type of fermen- 

 tation [Groenewege, 1920]. Peptococcus and Peptostreptococcus represent 

 the anaerobic proteolytic micrococci and streptococci respectively; 

 Butyrisarcina has been adopted as a designation for the butyric acid 

 producing Zymosarcina maxima (Lindner) Smit and possibly allied forms. 



Finally the name Zymobacillus has been introduced for the faculta- 

 tively anaerobic sporeforming bacteria of the type Bacillus macerans 

 Schardinger. 



Provisionally, and with great reservation, we have added two genera, 

 Phaeo spirillum and Phaeomonas, for bacteria belonging to the group of 

 organisms which Utermohl [1924] has designated as Phaeobacteria. 

 These show very close affinities with the Athiorhodaceae, both morphol- 

 ogically and physiologically. It is entirely possible that a careful study 

 of these brown bacteria will reveal facts which would justify their 

 inclusion in the corresponding genera of the purple bacteria, Rhodo- 

 spirillum and Rhodomonas. 



In the composition of the table some difficulty was experienced, 

 however, in view of the fact that for a few of the existing genera the 

 katabolic properties are still insufficiently known. In some cases the 

 relationships of such genera to organisms, whose position could be 

 readily determined, were more or less evident, and therefore their 

 place in the table has tentatively been indicated. This holds e.g. for 

 the genera Aeromonas and Fusiformis. In other cases even such indica- 

 tions are lacking, and so a few genera well-known to the medical bac- 

 teriologist could not yet be classified. This applies e.g. to Pasteurella, 

 Dialister, Haemophilus, Listerella and to the species Coryne bacterium diph- 

 theriae which, owing to its indubitable fermenting capacity, cannot be 



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