THE CLASSIFICATION OF BACTERIA 49 



Bacillus der Mauseseptikamie Koch : Mitteilungen a. d. Kaiserl. Gesund- 



heitsamte, I, 1881, 80. 

 Bacillus insidiosus Trevisan : Nouv. gen. di Batter, 1885, 10. 

 Bacillus nmrisepticus Fliigge: Die Mikroorganismen, 1886. 

 Bacillus 7Hurinus Schrbter: Die Pilze von Schlessian, 1886. 

 Bacterium murisepticum Migula : Engler u. Prantl, Die Naturlichen Pfianzen- 



fainilien, 1895. 



The hog cholera bacillus likewise becomes Bacillus Salmoni 

 (Trevisan), notwithstanding the fact that it is more generally 

 known as Bacillus suipestifer Kruse. The reason for this is 

 shown in the following synonymy : — 



Bacillus of swine plague or swine fever, Klein : Report of the Local Govern- 

 ment Board, England, 1877-78. 



Hog Cholera Bacillus, Salmon-Smith : Report U, S. Dept. Ag., 1885. 



Bacillus der Schweinepest, Bang-Selander : Centralblatt f. Bakteriologie, III, 

 1888, 361. 



Pasteurella Salmoni Tr&vSsdin: Genera, 1889, 21. 



Amerikanischen Schweineseuche, Frosch : Zeitsch. f. Hygiene, IX, 1S90, 235. 



Bacterium cholerae-suum Lehmann-Neumann : Bakt. Diagnostik, 1896, 233. 



Bacillus suipestifer Kruse : Fliigge, Die Mikroorganismen, 1896, 233. 



Attention has already been called to the frequent use of tri- 

 nomials in the naming of species. This is, of course, entirely 

 contrary to the most ordinary rule of botanical nomenclature. 

 A trinomial, properly speaking, is an expression for a varietal 

 form. Thus, Bacillus fluorescens-undulatus (Ravenel), if strictly 

 interpreted, would mean variety undulatus, of the species Ba- 

 cillus fluorescens. The fact is, it stands for nothing of the sort. 

 Other forms of a similar character occur, as B. fluorescens-aureus, 

 fluorescens-crassus,fluorescens-immobilis,fluorescens-liquefaciens, 

 Jluorescens-longus, fluorescens-minutissimus, fluorescens-nivalis, 

 fluorescens non-liquefaciens, fluorescens-putridus, fluorescens- 

 tenuis, and so on, in a dozen or more instances. Bacillus, 

 or, more properly speaking, Pseudomonas fluorescens-undulata 

 (Ravenel), should be changed to Pseudomonas undulata (Rave- 



