GENERAL SYSTEMATIC BACTERIOLOGY 179 



It would seem that the generic name Aplanohacter Smith must be 

 regarded as a synonjTii of Bacteridium Davaine, and hence invalid 

 unless it can be shown that for some reason the latter name as well 

 as Pollendera are not tenable. 



Arloingillus. A genus of anaerobic spore bearing bacteria pro- 

 posed by Heller (1922, p. 21). Her description follows: 



Clostridioideae that attack sugars with considerable energy but have a some- 

 what restricted action on proteins. Liquefy gelatin but do not produce H2S 

 demonstrable by a lead-acetate-paper test in blood broth. In meat medium 

 produce gas and a pink coloration that soon fades. Autoagglutinate readily. 

 Clot milk if blood is present. Do not digest serum or egg. Vegetative forms 

 are small Gram-negative rods with even staining; forms about to sporulate are 

 uneven in staining reaction, often far larger than vegetative rods, citron or 

 spindle shaped; orgonts (see Heller), show marked tendency to store up granu- 

 lose. Spores oval, vary greatly in length. Bacilli do not form long chains in 

 the liver of animals. Colonies in deep agar lenticular, sometimes showing con- 

 centric formation, or compound lenticular. Colonies vary considerably ac- 

 cording to species. T\qoically toxic tissue invaders which produce marked 

 haemolysis. Pathogenic for guinea-pigs, cattle and sheep. 



Type species A. C/iawt'oei {Bacterium Chauvoei Arloing, Cornevin, and Thomas) 

 as described in a future paper. 



This genus contains several species which will be discussed. These organisms 

 show some similarity to those of the genus Clostridium. 



The B. enteritidis-sporogenes Klein, as described by von Hibler (1908) should 

 probably be included in the genus. The only character which is markedly 

 different from that of the genus is the energetic fermentation of milk shown by 

 von Hibler's bacillus IV. 



Arthrobacillus. A genus of bacteria proposed by Fischer (1895, 

 p. 136) to include the non-motile rod-shaped organisms which pro- 

 duce arthrospores. No type was designated. 



Arthrobacter. A generic name proposed by Fischer (1895, p. 141) 

 to include all non-fiagellate rod-shaped bacteria which produce 

 arthrospores. No species are named, hence the genus is invalid. He 

 says "Vorlaufig kann keine Art mit Sicherheit hierhergestellt werden, 

 vielleicht wiirde das Bacterium Ureae hierhergehoren. " He apparently 

 ascribes the name to De Bary as he writes Arthrobacter (De Bary). 

 Fischer (1903) himself later abandoned the designation. It is listed 

 as invalid by Erwin F. Smith (1905, p. 174). 



Arthrobacteriaceen. A "Gattung" proposed by Hueppe (1886, 

 p. 145) to include the rod shaped bacteria which produce arthrospores 

 or at least do not form endospores. The " Untergattungen " Arthro- 

 hakterium {Bakterium s. str.) and Spirulina (Proteus) are included. 

 Evidently this should be regarded as a casual family name. 



