78 MORPHOLOGY OF THE BACTERIA. 



M. of exanthematous typhus, Hallier. 



M. relatively large, brown, having a rapid 

 movement, sometimes in chains (Mycothrix), in 

 the blood. 



M. of intestinal typhus, Hallier. 



M. very small, in repose in the blood ; larger, 

 endowed with active motions, and furnished 

 with contractile appendices in the dejections. 



M. of glanders, Ziirn. 



Cells free or attached to the blood globules, or 

 even penetrating into their interior, sometimes 

 in chains (Mycothrix) in the blood. M. in 

 chains, very numerous, and endowed with rapid 

 movements, in the lymphatic ganglia, the mu- 

 cus of the frontal sinuses, and in the chancroid 

 ulcers. 



M. of syphilis, Hallier. 



M. numerous, colorless, free or in globules, in 

 gonorrhoea, the primitive ulcer, and the blood of 

 persons suffering from constitutional syphilis. 



MONADS. 



Beside the Spherobacteria are placed the Mon- 

 ads, not the organisms described under this name 

 by the older microscopists, comprising micro- 

 phytes, spores, and infusorial animals, but the 

 Monas as understood by botanists of the present 

 day. Thus limited, the Monads include also, be- 

 sides some microphytes related to the Spherobac- 

 teria, and differing from them by their greater 

 dimensions, some organisms of doubtful affinities. 



