86 MORPHOLOGY OF THE BACTERIA. 
some phases of development of Clathrocystis roseo- 
persicina of Cohn. Now Cohn is inclined to regard 
the Monas vinosa, Ehrb. as the wandering cells of 
Clathrocystis. On the other hand Warming has de- 
scribed his : — 
B. sulfuratum, Warming, 1876, giving it for synonymes, 
Monas vinosa, Ehrb.; M. erubescens, Ehrb.; M. Warm- 
ingit, Cohn; Lhabdomonas rosea, Cohn. It follows, 
then, that the Monas which we have described with 
the Spherobacteria should be referred to a Bacterium 
called sulphuratum by Warming, but which is also. 
identical with B. rubescens of Ray-Lankester. 
3. DESMOBACTERIA. 
Filiform bacteria, composed of elongated cylin- 
drical articles, isolated, or in chains more or less 
extended, resulting from transverse division. Un- 
der this form they correspond to leptothrix, Auct. 
(differing from torula in that the filaments are not 
constricted at the point of junction of the articu- 
lations); filaments sometimes united in swarms, 
never in zooglea. Movements and state of re- 
pose alternating and depending upon the presence 
or absence of oxygen, the reaction of the medium, 
and other conditions unknown. Some forms never 
exhibit movement.— Bacteridie of Davaine (Cohn). 
We will only preserve in the Desmobacteria the 
genus Bacillus, Cohn. The vibrios are rather al- 
lied to Spirillum because of their undulating fila- 
ments. 
However, after the exposition of the different 
species of Bacillus, we will say something of three 
genera of colorless oscillatoriaceze, which are nearly 
