78 GENERAL SYSTEMATIC BACTERIOLOGY 



II. Cells as a rule rod shaped, seldom spherical, or bent: 



a. Without endospores Bacterium 



b. With endospores Bacillus 



III. Cells as a rule slightly to decidedly spirally bent: 



a. Comma shaped Vibrio 



h. Stiff spirals Spirillum 



c. Flexose spirals Spirochaete 



Chatton and Perard (1913) introduced the generic names Meta- 

 bacterium and Oscillospira. 



Vuillemin (1913) has given a comprehensive review of bacterial clas- 

 sification with particular reference to the fact that at the Botanical 

 Congress that was to have met in 1915 the date of departure and special 

 rules for bacterial nomenclature were to be considered. He suggested 

 that the date of departure be fixed as 1915 and that the genera and higher 

 groups that follow should be adopted as genera conservanda, or "natural 

 history" genera. 



Vuillemin's Classification of Bacteria (1913) 



I. Plastids rounded (spherical). 



A. Dissociated or grouped without regular order. 



1. Polar flagella Planococcus 



B. Associated in elementary colonies of determined form. 



1. Divisions parallel. 



a. Grouped in rosaries Streptococcus 



b. Pairs encapsulated, isolated or united into a rosary. Ele- 



ments sometimes elongated or pointed. 



Klebsiella 



2. Division in two planes at right angles. 



a. Fission centripetal. 



(1) Non-motile Merista 



(2) Flagellated Planomerista 



b. Fission excentric Neisseria 



3. Division in three planes at right angles. 



a. Non-motile Sarcinn 



h. Flagellated Planosarcina 



II. Plastids rod-shaped. 



A. Sporiferous elements specialized 



1. Oval. Flagella unknown Metabacterium 



2. Claviform. Flagella diffuse Clostridium 



B. None of the sporiferous elements distinct from the vegetative rods. 



1. Flagella diffuse Serratia 



2. Flagella polar Bacterium 



III. Plastids sinuous. 



A. Flagella polar Spirillum 



