358 GENERAL SYSTEMATIC BACTERIOLOGY 



Die Definition einer Proteus -Bakterie wird daher: Eine sporenfreie, peritriche 

 Stabchenbakterie, welche die Gelatine verfliissigen kann, und ihr Gattungsname 

 DQUSz in Analogie mit meiner iibrigen Nomenklatur Liquidohacteriuvi sein. Laut 

 dieser Definition mtissen wir unter anderem die farbstoffbildenden Bakterien 

 B. prodigiosum und B. violaceum als Proteus-Bakterien betrachten. Dies stimmt 

 auch gut : denn beide erzeugen Indol und andere stinkende Produkte. Ueberdies 

 bildet Liquidohacterium prodigiosum ebenso wie Liquidohacteriuvi vulgare aus 

 Zuclier vornehmlich Bersteinsaure und Ameisensiiure. Es erinnert durch sein 

 hohes Fettspaltungsvermogen an Liquidomonas fluorescens und durch seine 

 Vorliebe fiir stjirkehaltige Substanzen an die Kartoffelbacillen. 



The genus is assigned to the order Peritrichinae family Alkali- 

 baderiaceae, and is defined as requiring as a rule organic N. sources, 

 and as being an aerobic decay bacterium which does not produce 

 spores, and which liquefies gelatin. 



Since it is first mentioned, probably Liquidohacterium prodigiosum 

 (Ehrenberg) Orla-Jensen is to be regarded as the type. 



Liquidococcus. A generic name proposed by Orla-Jensen (1909, 

 p. 332). The genus is included in the family Luminihacteriaceae of 

 the order Cephalotrichinae. 



It is defined to contain those cocci which liquefy gelatin and which 

 do not as a rule require organic nitrogen sources for development. 

 No species is named or designated. 



As a generic name Liquidococcus is probably best regarded as invalid 

 or as a synonym of Staphylococcus or Micrococcus. 



Liquidomonas. A genus of bacteria proposed by Orla-Jensen 

 (1909, p. 332). It is included in the family Luminobacteriaceae of the 

 order Cephalotrichinae. It includes straight rod-shaped organisms 

 which are active liquifiers, which as a rule do not require organic nitro- 

 gen, aerobic and are as a rule fluorescent and sometimes denitrifying. 



The first mentioned organism (type) is Liquidomonas fluorescens 

 Orla-Jensen. 



Later (1921, p. 271) he states: 



As the property of liquefying gelatin also cannot be adopted as a generic 

 character, I think it would be best to group together my earlier genera Denitro- 

 monas and Liquidomonas in a single genus, which can be conveniently termed 

 Fluormonas, as the bacteria of this group are ordinarily fluorescent. I cannot 

 agree to call this genus Pseudomonas merely out of regard for so-called priority, 

 as each and all of the bacteria which belong to the order under consideration are 

 really Pseudomonades as well. 



And also: 



