GENERAL SYSTEMATIC BACTERIOLOGY 59 



2. Cell division, before the formation of gonidia, takes place in three 

 directions of space : 



a. Filanaents surrounded by a delicate, scarcely discernible 



sheath Phragmidiothrix 



b. Filaments surrounded bj^ a plainly discernible sheath. 



Crenothrix 



B, Filaments show false branchings Cladoihrix 



II. Cell contents contain sulfur granules Thiothrix 



Lehmann and Neumann (1901) in the second edition of the Grimd- 

 riss replace the designation of the Anhang I Hyphomycetes with the 

 name Actinomycetes and the generic name Oospora with Actinomyces. 

 Otherwise the classification remained the same. During this year 

 the generic name Azotobacter was suggested by Beijerinck for certain 

 non-sjTnbiotic nitrogen fixing bacteria of the soil. He also used the 

 name Urococcus as a generic designation of certain urea-hj^drolyzing 

 cocci. Bongert used Corynethrix to designate an organism associated 

 with mouse pseudotuberculosis. 



Kendall (1902) proposed a revision of the Migula classification by 

 the addition of certain genera to the family Bacteriaceae. The new 

 genera were based entirely upon flagella distribution. A key to the 

 genera recognized by this author follows : 



Kendall's Classification of the Bacteria (1902) 



A. Coccaceae: Cells spherical in a free state, not elongate in any direction 



before division: 



1. Non-motile: 



a. Cells in chains, planes of fission parallel. 



Streptococcus Billr. 



b. Planes of fission without definite sequence. 



Micrococcus Cohn 



c. Planes of fission three, at right angles. 



Sarcina Goodsir 



2. Motile: 



a. As in Micrococcus Planococcus Migula 



b. As in Sarcina Planosarcina Migula 



B, Bacteriaceae: Cells elongated, cylindrical, cells elongated before 



division: 



1. Non-motile: 



a. Not branching Bacterium Ehr. 



b. Branching Mycobacterium Leh.-Neum. 



2. Motile: 



a. Flagella peritrichic Bacillus Cohn 



b. Monotrichic Bactrillius Kendall 



