312 GENERAL SYSTEMATIC BACTERIOLOGY 



Euspmllum. A name first proposed by Trevisan (1889, p. 24) for 

 the first subgenus of Spirillum. The description is ''Spirilli tipici, 

 constantemente con forme a guisa di cavaturaccioli." Twenty-five 

 species are included. The second subgenus is Pseudospirillwn. This 

 name was also used by Migula (1895, p. 33) for the first section under 

 his genus Spirillum to include those forms in which the cell contents 

 are colorless differentiating it from the second section, Thiosvirillum 

 Winogradsky. 



Meyer (1912, p. 3) included in this section of the genus Spirillum 

 all those species which contain no bacteriopurpurin and are motile. 



Eu-Spirillum. A subgenus of the genus Spirillum proposed by 

 De Toni and Trevisan (1889, p. 1009) with the following diagnosis: 

 "SpirilH regulariter spirales, rigidi, abbreviata, spiris uniformibus." 

 Twenty species are included, among them Spirillum undula, S. tenue 

 and S. serpens. This is a variant of Euspirillum. 



Euspirosoma. A subgenus of the genus Spirosoma created by Migula 

 (1900, p. 955) to include those forms in which the cells are free, that 

 is not embedded in gelatin. The second subgenus was Myconostoc. 



Euvibrionieae. A subtribe of bacteria proposed by Trevisan (1879, 

 p. 137) with the following description: ''Somatia libera eramosa." 

 It was included in the tribe Vibrionieae, and contained the following 

 genera: Mantegazzaea, Metallacter, Leptotrichia, Beggiatoa. Crenotkrix, 

 Vibrio, Svirillum, Spirochaeie, and Spiromonas. 



Fenobacter. This name has been used by Beijerinck (1900, p. 200) 

 as a generic designation of organisms belonging to the hay bacillus 

 group. Apparently it has not been used by other authors. It may 

 possibly be regarded as a synonym of Bacillus although the author 

 emphasizes its relationship to Aerobacter. It is rejected as invalid 

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



Ferribacterium. A generic name proposed by Brussoff (1916, p. 

 547) for a species Ferribacterium duplex (the type). The summary 

 of the characters which he gives follows: 



1. Ferribacterium duplex ist ein unbewegliches, dunkel oder hellgelb gefiirbtes 

 Bacterium. 



2. Es hat meistens die Form eines Doppelstabchens mit abgerundeten Enden, 

 erscheint aber auch in der Form von Stabchen und kurzen Ketten. 



3. Die Langen der Stabchen mit dem Gallerthof schwankt zwischen ca. 2^ 

 und 5n, die Breite ist ca. l^n gleich und ungefahr dieselbe bei alien Individuen. 



4. In jungen Torf-Wasser-Kulturen und in alien, selbst in alten Eisenammonci- 

 trat- und Eisenpepton-bouillonkulturen besteht jedes Individuum meistens aus 

 drei Elementen : dem inneren Stabchen, dem es umgebenden Gallerthof und der 



