208 GENERAL SYSTEMATIC BACTERIOLOGY 



la forme ou la longueur de ces elements, on ne leur distingue jamais d'extremit6 

 anterieure et d'extr6mit6 posterieure, de base ni de pointe; les mouvements, 

 lorsqu'ils existent, paraissent toujours se faire egalement dans les deux sens, et 

 quand des individus se fixent ou plutot s'accolent a un support, leur partie fix^e 

 ne diff^re en rien de celle qui reste libre. 



The definition of Migula of Bacteriaceae has been followed among 

 others by the following authors: Chester (1901, p. 117), Kendall (1902, 

 p. 484), A. J. Smith (1902, p. 270), Klocker (1903, p. 332), Migula 

 (1904, p. 145), Erwin F. Smith (1905, p. 160), Ellis (1909, p. 3), Frost 

 (1911, p. 57), Schneider (1912, p. 23). 



Winslow et al. (Committee Soc. Am. Bact., 1917, p. 560) recognized 

 this as the sixth family of the order Euhacteriales with the following diag- 

 nosis: "Rod-shaped cells without endospores. Gram-negative. Flag- 

 ella when present peritrichic. Metabolism complex, amino-acids 

 being utilized, and generally carbohydrates." 



Buchanan (1918, p. 27) recognized this as the second family of the 

 Euhacteriales, with the following description: 



Cells rod-shaped, straight, or at least not spherical or spiral. Never contain- 

 ing sulphur granules, nor with bacterio-purpurin, many species pigmented. 

 May or may not be motile by polar or diffuse flagella. Cells may be single or in 

 chains. Endospores produced in some genera, not in others. A pseudoplas- 

 modium never developed. Growth energy not secured by the oxidation of ammo- 

 nia or nitrites. 



In 1920 Winslow et al. (p. 208) describe Bacteriaceae as the fifth 

 family of the Euhacteriales including seven tribes. 



Bergey et al. (1923, p. 84) recognizes this as the fourth family of the 

 order Euhacteriales with the description: ''Rod-shaped cells without 

 endospores. Motile or non-motile. Metabolism complex, amino- 

 acids being utilized, and generally carbohydrates. Usually Gram- 

 negative." Nine tribes are included. 



It is evident that while the earlier writers used this name as a desig- 

 nation of the entire group of bacteria, the later writers have uniformly 

 regarded it as a family within the group. 



Bacteriaceen. An aberrant form of spelling of the family Bacteria- 

 ceae iq.v.) used by Zopf (1884, p. 45, and 1885, p. 51). 



Bacteriacees. An aberrant form of spelling of the family Bacteria- 

 ceae iq.v.) used, among others, by Cornil and Babes (1890, p. 151). 



Bacteriacei. An aberrant form of spelling of the family Bacteriaceae 

 iq.v.) used by Schroter (1885, p. 155). 



