GENERAL SYSTEMATIC BACTERIOLOGY 33 



Fltigge's Classification of Bacteria (1886) 



a. Cells spherical. 



b. Cells isolated, or bound in chains united into amorphous slimy families. 



1. Micrococcus 

 bb. Cells united into definite slimy families. 

 c. Colonies solid (filled with cells). 



d. Cells united in large and indefinite numbers into irregular 



colonies 2. Ascococcus 



dd. Cells in small but definite numbers united into regular fami- 

 lies 3. Sarcina 



cc. Colonies with peripheral layers of cells, no cells in the interior. 



4. Clathrocystis 

 aa. Cells cylindric. 



b. Cells short cylindric, single or loosely hanging together, or united into 



amorphous slimy masses 5. Bacterium 



bb. Cells longer cylindric, bound into filaments. 



c. Filaments isolated, in filaments or in bundles, 

 d. Filaments unbranched. 

 e. Filaments straight. 



f. Filaments short, definitely jointed. 



6. Bacillus 



ff. Filaments long, indefinitely jointed, 

 g. Filaments very slender. 



7. Lepiothrix 

 gg. Filaments thicker. 



8. Beggiatoa 

 ee. Filaments undulating or spiral. 



f. Short, stiff 9. Spirillum 



(Vibrio) 



ff . Long, flexible 10. Spirochaeta 



dd. Filaments with false branches. 



11. Streptothrix 



12. Cladothrix 

 cc. Filaments enclosed in round gelatinous masses. 



13. Myconostoc 



Genera doubtfully belonging here: Crenothrix, Sphaerotilus, Spir- 

 omonas, Rhahdomonas, Monas. 



Schroeter (1886) outlined the most complete and elaborate class- 

 ification of bacterial genera and species that had been prepared up to 

 that time. He introduced a number of new genera. His generic key is 

 as follows: 



Schroeter's Classification of Bacteria (1886) 



I. Order: Coccohacteria. Cells in all stages of development, spherical- 

 elliptical, never motile. Spores, if present, developing through trans- 

 formation of an entire cell. . .Family Coccaccei Zopf. 



