92 MICROBES, FERMENTS, AND MOULDS. 
a. Cylindrical filaments, indistinctly articulated, mo- 
tionless. 
a. Unramified, very slender filaments; 
(1) Short... sei sa won ve os. Bacillus. 
(2) Long ..: ne Leptothriz. 
8. Filaments repeatedly bifureated {false Fane 
cations) ee es wae «. Cladothriz. 
b. Spiral, movable filaments: 
(1) Short, faintly undulated tae ves «.. Sptrochete. 
(2) Long, flexible ... aes ase eon oe. Vibrio. 
(8) Short, rigid... ae oes awe oe Spirillum. 
(4) Rolled into mucilaginous mass oe - Myconostoe 
B. Cells dividing cross-wise, and the daughter eile re- 
maining united, like packets tied with a crossed 
cord i Ses dee cae wha - Sarcina. 
Most of the microbes of which we have now to speak 
may be assigned to one or other of the genera given in 
this scientific enumeration, and sometimes, on account 
of their polymorphism, to several of these genera. 
Before making a more detailed study of some of 
them, it may be interesting to glance at them as a 
whole, following the order of classification given above. 
The genus Micrococcus (Hallier) includes the 
spherical microbes, which are the most common and 
the most widely diffused, probably because the spores 
and early stages of all the other forms 
Ff 6 
*2¥%3", have this spherical shape before be- 
o? BSS, . . ‘ 
aay ane ae coming elongated and assuming their 
2 ae adult form (Fig. 50). 
Hes 4 This genus is divided into two 
tie te “sections: the first includes Micro- 
1 1d . * . 
sie -  coceus chromogenis, i.e. fabricators of 
colouring matter—an extremely interesting group, on 
