SURVEY OF CLASSIFICATIONS OF BACTERIA 35 



119). This order and family include a single genus Sporovihrio Starkey 

 (Arch. f. Microb., 9, 1938, 300) syn. Desulfovibrio Kluyver and Van Niel 

 (Cent. f. Bakt., II Abt., 94, 1936, 389). Two genera {Treponema and 

 Borrelia) of Spirochaetales are listed by Prevot in his Monograph {loc.cit., 

 p. 16) as including anaerobic species. 



Stanier and Van Niel (Jour. Bact., 4^, 1941, 437-466) have proposed a 

 rearrangement of the classification outline as indicated below: 



Kingdom Monera 



Division I Myxophyta (Blue-green algae) 



Division II Schizomycetae (Bacteria) 

 Class I Eubacteriae 



Order I Rhodobacteriales 



Order II Eubacteriales 



Order III Adinowycetales 



Class II Myxobacteriae 



Order I Myxobacteriales 



Class III Spirochaetae 



Order I Spirochaetales 



Ajjpendix to Division Schizomycetae 



Group I Includes two families, Leptotrichaceae and Crenothri- 



caceae 

 Group II Achromaiiaceae 



Group III Pasleuriaceae (Includes three genera, Pas(eicria,Hypho- 

 viicrobium and Blastocaulis) 



The genera Mycobacterium, Corynehacterhim, Erysipelothrix, Leptotrichia, 

 Nevskia, GallioneUa, Caulohacter, Thiospira, Siderocapsa and Sideromonas 

 are placed in Eubacteriales. Two genera not previously discussed in this 

 review whose relationships to other bacteria have recently been clarified 

 are Sporocytophaga Stanier (Jour. Bact., 40, 1940, 629) and CTjtophaga 

 Winogradsky (Ann. Inst. Past., 43, 1929, 578). 



This rearrangement has been carried out by including the organisms 

 placed in the Order Caulobacteriales Henrici and Johnson (Jour. Bact., 30, 

 1935, 61-93) in the Order Eubacteriales (Buchanan, Jour. Bact., 3, 1917, 

 162). The genera of the Order Chlamydobactcriales Buchanan {loc. cii.) 

 are transferred to an appendix or are dropped {Clonothrix) as belonging to 

 the blue-green algae. Three of the remaining five orders are raised to the 

 rank of classes, one of which (Eubacteriae) includes three orders Rhodo- 

 bacteriales (Pringsheim, Lotos, 71, 1923, 351), Eubacteriales (Buchanan, 

 loc. cit.) and Actinomijcetales (Buchanan, loc. cit.). Rhodobacteriales in- 

 cludes the sulfur purple, the non-sulfur purple and the green bacteria, the 

 colorless sulfur bacteria {Beggiatoaceae) being transferred to the Myxophyta 

 with the change of the name of the Order from Thiobacteriales Buchanan 

 (loc. cit.) to Rhodobacteriales Pringsheim {loc. cit.). 



