GENERAL SYSTEMATIC BACTERIOLOGY 213 



Bacteriopsis ureae = Micrococcus ureae Zopf. 

 Bacteriopsis ianthina = Bad. ianthinum Zopf. 

 Bacteriopsis synxantha = Vibrio synxanthus Ehrenb. 



Bacteriopsis ovata = Panhistophyton ovatum Lebert. 



The genus has not been used by subsequent authors, and is not even 

 recognized by DeToni and Trevisan (1889). 



It is rejected by Erwin F. Smith (1905, p. 174). 



Probably the first named species, Bacteriopsis Rasmusseni, should be 

 regarded as the type. It was later (1889, p. 930) placed by De Toni and 

 Trevisan in the genus Rasmussenia (the fourth species, R. anceps). If 

 no older generic name for the mouth leptothrix forms can be found, this 

 would probably be a valid designation for them. It may be regarded 

 as a synonym of Leptotrichia. 



Bacterium. A generic name proposed by Ehrenberg (1828, p. 8). 

 His diagnosis is as follows: 



Bacterium, Novum Genus, Familia Vibrionorum. Character Generis: Cor- 

 pus polygastricum? anenterum? nudum, oblongum, fusiforme aut filiforme, 

 rectum, monomorphum (contractione nunquam dilatatum), parum flexile (nee 

 aperte undatum), transverse in multas partes sponte dividuum. 



The only species described was Bacterium triloculare The descrip- 

 tion was as follows: 



B. triloculare nov. spec; distincte triloculare s. triarticulatum, subfusi- 

 formum, hyalinum. 



Animalculum 1 300 lineae longum, corpore tereti. Articuli s. septa interna 

 divisionem instantem multiplicem transversam indicare videntur. Mobile sed 

 pigrum animalculum. 



In Oasi Jovis Hammonis Siwae observatum, praeterea nullibi. 



Bacterii Generis physiologia huiusque obscurra. Cibo colorato Ventriculos 

 replere hae formae respuunt ideoque ad Polygastrica non misi dubitanter et 

 interim coUocantur. 



While it is not improbable that Ehrenberg actually described one of 

 the organisms now included with the bacteria, it is evident that there is 

 nothing in the description which would make probable a modern identi- 

 fication of the species. 



Two years later Ehrenberg (1830, p. 38) included some eleven species 

 in his Bacterium. It is to be noted that some were not new species. 

 Several of Mueller's species of infusoria described in 1783 were included, 

 among them being Bacterium {Monas) termo (Mueller) Ehrenberg. In 

 the previous (1828) paper, Ehrenberg had recognized Monas termo 



