31 
ary 10, 1828, but this was not published until 1829 or possibly until 
1830. In the meantime Hemprich & Ehren berg’s (1828a) S} T mbohe 
pt^sicte, v. 4, appeared, in which Bacterium is also published as a 
new genus. According* to the zoological code, it dates from this 
(1828) paper, since this is its first publication. The original diagnosis 
reads as follows: 
Bacterium , Novum Genus, Familia Vibrioniorum. 
Charater Generis: Corpus polygastricum ? anenterum? nudum, oblongum, fusi- 
form e aut filiforme, rectum, monomorphum (contractione nunquam dilatatum), 
parum flexile (nec aperte undatum), transverse in multas parte sponte dividuum. 
B. triloculare nov. spec. : distincte triloculare s. triarticulatum, subfusiforme, 
hyalinum. Phytozoa Tab. II. Libyca fig. 6. 
Animalculum linese longum, corpore tereti. Articuli s. septa interna divisio- 
nem instantem multiplicem transversam indicare videntur. Mobile sed pigrum 
animalculum. 
In Oasi Iovis Hammonis Siwae observatum, praeterea nullibi. 
Bacterii Generis physiologia hucusque obscura. Cibo colorato ventriculos replere 
hae formae respuunt ideoque ad Polygastrica non nisi dubitanter et interim collocantur. 
Bacterium simplex vide Monas simplex. 
scintillans vide Monas scintillans. 
Later in the paper, reference is made to “6 species,” but these do 
not appear to have been named. 
In his next paper, Ehrenberg (1829 or 1830a, 15) mentioned briefly 
Bacterium triloculare , B. simplex , and B. scintillans , but as the two 
latter species were eliminated by him from Bacterium in 1828, B. tri- 
loculare remains as type of the genus. 
In a third paper presented to the Berlin Academy by Ehrenberg on 
March 4 and 18, and printed on August 13, 1830, Ehrenberg (1830a, 
58) again referred to Bacterium as a new genus with the following 
diagnosis: 
Corpore oblongo, fusiformi aut filit'ormi (tereti aut triquetro nec quadrangulo) 
aperte undatim non flexili, nec spirali. 
He states that there are 11 species in this genus and later in the 
paper he mentions Bacterium tremulous , 66 B . monos f” B. cylin- 
dricum , B. deses , B. enchelys , B. fuscum , and B. punctum. 
In a paper presented to the Academy in 1831, Ehrenberg (1832, p. 
59) eliminates B. cylindricum and B. deses to Monas / on page 60 Bacte- 
rium simplex Hemprich & Ehrenberg is given as Monas simplex , and 
Bacterium scintillans as Monas scintillans / under the genus Bacterium 
he gives the following: 
Bacterium E., Gliederstabchen. 
-f-)deutliche Gliederung. 
1. B. articulatum E., Perlenschnur-Gliederstabchen, Langendurchmesser 1/192 ' ' 
Korper farblos, etwas spindelformig, wenig biegsam, mit mehreren deutlichen 
Abtheilungen (Spuren der Selbsttheilung). Bewegung zitternd. Berlin. 
2. B. triloculare H. & E., dreifachriges Gliederstabchen, Langendurchm. 1/30CK". 
Korper etwa3 spindelformig, farblos, mit drei Abtheilungen. Afrika. 
