210 COMMITTEE REPORT 



Long rods occurring in evenly curved chains. Gram positive. 

 Motile. Proteus-like growth on media. Facultative anaerobes. 

 Carbohydrates and gelatin not attacked, hydrogen sulphide not 

 formed. 



Type species, Z. zopfii (Kurth) Wenner and Rettger. 



Tribe 4. Bactereae, Nov. Trib. 



Gram negative rods growing freely on artificial media. Gen- 

 erally forming acid from carbohydrates and often gas composed 

 of C0 2 and H 2 . 



Genus 5. Proteus Hauser 1885, p. 1 



Synonyms: Spirulina Hueppe 1886; not Spirulina Turpin 1827; 

 Liquidobacterium Jensen 1909. 



Highly pleomorphic rods, filaments and curved cells being 

 common as involution forms. Gram negative. Actively motile. 

 Characteristic amoeboid colonies on moist media. Liquefy gela- 

 tin rapidly and produce vigorous decomposition of proteins. Fer- 

 ment glucose and sucrose (but usually not lactose), with forma- 

 tion of acid and gas (the latter being C0 2 only). 



Type species, P. vulgaris Hauser. 



Genus 6. Bacterium Ehrenberg 1828, emended Orla-Jensen 



1909, p. 315 



Synonyms: Tyrothrix Duclaux 1879; Actinobacter Duclaux 1882 in 

 part; Klebsiella Trevisan 1885 in part; Kurthia? Trevisan 1885; Glis- 

 crobacteriumM.alerbsi and Sanna Salaris 1888; Pneumobacillusf Arloing 

 1889; Aerobacter Beijerinck 1900; Salmonella Lignieres 1900; Pyobacillus 

 Koppanyi 1907. 



Gram negative, evenly staining rods. Often motile, with 

 peritrichic flagella. Easily cultivable, forming grape-vine leaf or 

 convex whitish surface colonies. Liquefy gelatin rarely. All 

 forms except B. alcaligenes and the B. abortus group attack the 

 hexoses and most species ferment a large series of carbohydrates. 

 Acid formed by all, gas (C0 2 and H 2 ) only by one series. Typi- 



