MIGULA’S CLASSIFICATION OF BACTERIA 19 
Cells with organs of motion (flagella). 
a. Flagella distributed over the whole body...... Bacillus. 
b. Flagella polar.............00....0........ Pseudomonas. 
3. SPrRivtacka#. Cells rigid, not snakelike or flexuous. 
a. Cells without organs of motion............. Spirosoma. 
b. Cells with organs of motion (flagella). 
1. Cells with one, very rarely 2-3 polar flagella 
Microspira. 
2. Cells of polar flagella, in tufts of from 5-20 
Spirillum. 
Cells flexuous............ 0.22.0... s4ihas ar eye des Spirocheta. 
4. CHLAMYDOBACTERIACEH. Cell contents without granules of 
sulphur. 
A. Cell threads unbranched. 
1. Cell division always only in 1 plane... .Streptothrix. 
2. Cell division in 3 planes previous to the formation of 
conidia. 
a. Cells surrounded by a very delicate, scarcely visible 
sheath (marine)................. Phragmidiothriz. 
b. Sheath clearly visible (in fresh water)...... Crenothriz. 
B. Cell threads branched (pseudo-branches)... ... Cladothrizx. 
Cell contents containing sulphur granules............. Thiothriz. 
5. Breeratoacem. Only one genus known (Beggiatoa Trev.), 
which is scarcely separable from Oscillaria. Character as given 
under the family. 
Lesions due to infections that have been attributed to one or 
more species of microdrganisms. It has already been stated that 
the lesions following wound infections may be brought about by a 
“variety of bacteria and also that certain of these disease processes 
are sometimes recognized as distinct maladies. There are a number 
of affections which belong to this class. From some of these, such 
as botryomycosis, a supposedly specific organism has been isolated 
and described. A number of workers, however, have found that 
other bacteria may produce apparently the same morbid changes. 
It seems wise to consider briefly the pathology of the more important 
of these infections. It should be stated, however, that the amount 
of work that has been done on these subjects is not sufficient to pre- 
clude the possibility of a specific etiological factor for each. The 
association with the lesions of certain species of bacteria suggests 
that possibly they are the result of a number of organisms acting 
either singly or together as mixed infections. 
Botryomycosis. This name was given to a variety of lesions 
found more commonly in the horse, but occurring also in cattle, 
