STUDIES IN THE CLASSIFICATION AND NOMEN- 

 CLATURE OF THE BACTERIA 



VIII. THE SUBGROUPS AND GENERA OF THE ACTINOMYCETALES 



R. E. BUCHANAN 



From the Bacteriological Laboratories of the Iowa State College, Ames, Iowa 



Received for publication October 22, 1916 



Order III. Actinomycetales. Nom. Nov. 



Synonyms : 



Actinomycetes Balbiani, 1886, p. 542. 

 Trichobacteriacei Fischer, 1895, p. 138 in part. 



Mold-like organisms, not typically water forms, saprophytic 

 or parasitic. Sheath not impregnated with iron, true hyphae with 

 branching often evident, conidia may be developed, but never endo- 

 spores. Without granules of free sulphur and without bacterio- 

 purpurin. Never producing a pseudoplasmodium. Always non- 

 motile. 



The order Actinomycetales contains a single family, Actino- 

 mycetaceae. 



Family I. Actinomycetaceae. Fam. nov. 



Characters same as those of the order. 



The following names have been used for genera which may be 

 included in this family. 



Actinobacillus Brumpt, 1900, p. 849 

 Actinobacterium Haass, 1906, p. 180 

 Actinocladothrix Affanassieff, 1888, p. 79 

 Actinomyces Harz, 1877, p. 125 

 Cohnistreptothrix Pinoy, 1911 

 Viscomyces Rivolta and Micellone, 1879, p. 145 

 Leptotrichia Trevisan, 1879, p. 138 



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