CLASSIFICATION OF THE BACTERIA. mB: 
cus described by Hallier in several infectious mal- 
adies. 
2. The Microbacteria. 
3. The Desmobacteria, including Bacillus, Lepto- 
thrix, Beggiatoa, and Crenothriz. 
4. The Spirobacteria, including the three genera, 
Vibrio, Spirillum, and Spirocheta. 
5. Finally, we will give some account of the Mer- 
asmopedia, Sarcina, Ascococcus, Streptococcus, Myco- 
nostoc, Cladothriz, and Streptothriz. 
1. SPHEROBACTERIA, Cohn. 
The spherical bacteria are characterized by their 
rounded or oval form, their small size, often less 
than 1 p. They are ordinarily isolated, often in 
pairs (diplococcus), sometimes in a chain of several 
articles (streptococcus = torula of Cohn), the my- 
cothriz of Hallier and Itzigsohn, or in the form of 
zooglea when they are young and actively multi- 
plying, and that of mycoderma, when they are 
gathered upon the surface of liquids. They have 
no spontaneous movement, but a simple molecular 
trepidation. 
Functions: “The spherical bacteria are fer- 
ments, not producing putrefaction, but substitu- 
tions of another kind” (Cohn). 
Obs. According to the facts observed by Koch, 
Cohn, Pasteur, Toussaint, upon the development 
of certain bacteria, it is very probable that some 
at least of the spherobacteria are spores of Bacil- 
lus or of other bacteria; at least, the micrococci 
and these spores are identical in form and aspect. 
