36 GENERAL SYSTEMATIC BACTERIOLOGY 



A. Notcapsulated. {Bacilleae).. . .Genus 13. Bacillus Cohn 



Genus 14. Pacinia Trevis. (1885) 



Genus 15. Clostridium Prazmowski 



Genus 16. Pasteurella Trevis. 



Genus 17. Bacterium Cohn (1872) 



Genus 18. Bacteriopsis Trevis. (1885) 



B. Normally capsulated. (Klebsielleae) . 



Genus 19. Klebsiella Trevis. (1885) 

 III. Bacteriaceae coccogenae. One stage only of development, coccus. 



A. Cocci enclosed in common membranous mucous capsule {Ascococceae). 



Genus 20. Leuconostoc Van Tieghem 

 Genus 21, Ascococcus Cohn 

 Genus 22. Gaffkya Trevis. (1885) 



B. Cocci in packets, chains, or isolated. No capsules. 



Genus 23. Sarcina. Goodsir 



Genus 24. Staphylococcus Ogston 



Genus 25. Streptococcus Zopf. 



Genus 26. Micrococcus Cohn (emend) 



Maggi (1887) in his "Acque potabili" outlined a bacterial classifica- 

 tion as follows: 



Maggi's Classification of Bacteria (1887) 



A. Order I. Spirobacteria Cohn 



I. Genus 1. Spirochaeta Ehr. 

 II. Genus 2. Spirillum Ehr. 

 III. Genus 3. Vibrio Auct. emend. 



B. Order II. Desmobacteria Cohn 



I. Genus 1. Cladothrix Cohn 

 II. Genus 2. Crenothrix Cohn 



III. Genus 3. Beggiatoa Trevisan 



IV. Genus 4. Leptothrix Kiitzing 

 V. Genus 5. Bacillus Cohn 



C. Order III. Microbacteria Cohn 



I. Genus 1. Bacterium Dujardin emend. 

 II. Genus 2. Zygobacterium Maggi. 



D. Order IV. Sphaerobacteria Cohn 



I. Genus 1. Micrococcus. 



The new genus Zygohaderium with its single species Z. nitrosum 

 does not seem to be adequately described. The figures show slender 

 rods lying parallel to each other in pairs. 



Metschnikoff (1888) described as Pasteuria ramosa an organism which 

 he concluded was a bacterium which divided longitudinally rather than 

 transversely. Although this generic name has been used by subsequent 

 writers as a bacterial genus, it is probable that it is best regarded as 

 protozoan. 



