92 MICROBES, FEEMENTS, AND MOULDS. 



a. Cylindrical filaments, iudistinotly articulated, mo- 

 tionless. 

 a. Unramified, very slender filaments : 



(1) Short Bacillus. 



(2) Long Leptothrix. 



/3. Filaments repeatedly bifurcated (false ramifi- 

 cations) Cladothrix. 



h. Spiral, movable filaments : 



(1) Short, faintly undulated Spirochoete. 



(2) Long, flexible Vibrio. 



(3) Short, rigid Spirillum. 



_ (4) Rolled into mucilaginous mass Myconostoc 



B. Cells dividing cross-wise, and the daughter cells re- 

 maining united, like pa,ckets tied with a crossed 

 cord Sareina. 



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 difiiised, probably because the spores 



^ and early stages of aU the other forms 



\%'^°l'°°, have this spherical shape before be- 



• - />t*^. • coming elongated and assuming their 



. ;» • adult form (Fig. 50). 



Fig. BO. -Microbes ^his gcnus is divided into two 



™ococ<!M/(muSi en- sections : the first includes Micro- 



'^^ coccus chromogenis, i.e. fabricators of 



colouring matter — an extremely intei-esting group, on 



