CLASSIFICATION OF BACTERIA 



ScHizoMYCETES {Coticluded) 





Order 



Family 



Eubacteriales 



Bactereaceae 



Tribe 



Chromobac- 

 tereae 



Erwineae 



Zopfeae 



Bactereae 



Genus 



( Erythrobacillus 

 \ Chromobacterium 



5 Erwinia 



Zopfius 



/ Proteus 

 \ Bacterium 



Lactobacilleae s Lactobacillus 



Pasteurelleae 



/ Pasteurella 



Hemophilaeae {Hemophilus 



Bacillaceae 



I 



/ Bacillus 

 \ Clostridium 



In this the following orders, families, tribes, and genera are of 

 especial interest to the student of soil bacteriology: 



Family Nttrobaderiaceae, Secure growth energy by direct oxidation of carbon, 

 hydrogen, or nitrogen, or of simple compounds of these. Usually water 

 or earth forms. 



Tribe i. 



Genus 

 Genus 

 Genus 

 Genus 

 Genus 

 Genus 



Nitrobactereae, Energy from carbon or nitrogen 



Oxidize hydrogen for energy Hydrogenomonas 



Oxidize methane for energy Methanomonas 



Oxidize carbon monoxide for energy . . , . Carboxydomonas 



Oxidize alcohol for energy Acetobacter 



Oxidize ammonia to nitrites - . Nitrosomonas 



Oxidize nitrites to nitrates Nitrobacter 



Tribe 2. Azotobactereae. 



Genus i. Live free, fix nitrogen 



Genus 2. Live in symbiosis with legume, fix nitrogen 



Azotobacter 

 . Rhizobium 



