SUBGROUPS AND GENERA OF THE BACTERIACEAE 33 



p. 94) to include organisms which are not true bacteria. The 

 type species, Eubacillus multisporus, has chlorophyll, is fila- 

 mentous, and produces many endospores in a filament. Until 

 this organism can again be identified and studied more closely 

 its position is doubtful, and it should perhaps be excluded from 

 present consideration. 



The genera of the tribe Bacilleae may be differentiated by the 

 following key: 



Key to the genera of Bacilleae 



A. Usually a single endospore formed within each cell. 



I. Aerobic, usually Gram-positive, as a rule liquefying gelatin, spores 



usually not distorting rods when formed Genus 1. Bacillus 



II. Anaerobic or microaerophilic usually. 



a. Spores produced at extreme tip of cells, forming typical 



drmnsticks Genus 2. Plectridium 



b. Spores not produced at extreme tip of cells, at least not form- 



ing drumsticks. Cells usually somewhat swollen when 

 spores are formed Genus 3. Clostridium 



B. Usually a number of spores develop within a swollen cell. 



Genus 4. Metabacterium 



Genus 1. Bacillus Cohn, 1872b, p. 174 



Synonyms : 



Bactrella? Morren, 1830, p. 354 

 Metallacter? Perty, 1852, p. 180 

 Bacteridium Davaine, 1868, p. 21 

 Urdbdcillus Miquel, 1879, p. 517 

 Pollendera Trevisan, 1884, p. 943 

 Dispora? Kern, 1882, p. 135 

 Zopfiella Trevisan, 1885, p. 93 

 Cornilia Trevisan, 1889, p. 21 in part 

 Bacterium Migula, 1894, p. 237 in part 



not Bacterium Ehrenberg, 1828 



not Bacterium Cohn, 1872b, p. 167 

 Bactrinium Fischer, 1895, p. 139 

 Bactrillum Fischer, 1895, p. 139 

 Endobacterium Lehmann and Neumann, 1896, p. 103 

 Astasia Meyer, 1898, p. 49 

 Saccharobacter? Beijerinck, 1900, p. 200 



