CHAPTEE XIV. 



THE CHARACTERS OF SOME COMMONLY OCCURRING 

 ORGANISMS NOT FULLY DESCRIBED IN THE PRE- 

 VIOUS PAGES. 



Micrococcus aerogenes — M. agilis — BadlJ/iis aquatilis — B. a/rborescens 

 — Black torula — B. coli communis — B. enteriticHs (Gartner) — B. 

 enteritidds sporogenes (Kiein) — B. erythrosporus — SpiriUiom 

 Finkler-Prior — B. fluorescens Uquefadens — B. fluorescens non- 

 Uquefaciens — B. gasoform,ans — B. jacinihus — Magenta bacillus — 

 B. megatherium — S'pi^rillwm Metschnikovi — B. mesentericus fuscus 

 — B. mesentericus vulgatus — Bacillus of mouse septicsemia — Peat 

 bacteria — Phosphorescent bacteria — Pirik torula — B. prodAgiosus — 

 Proteus vulga/ris — Proteus mirabiUs — Proteus Zenkeri — Proteus 

 Zenheri (sewage variety of Klein) — B. ram,osus — Spirillum rubrum 

 — Sa/rci/na alba — Sarcina lutea — B. suhtilis — M. tetragenus — B. 

 tholoeideum, — SpirilUi/m tyrogenum — B. violaceus — M. violaceus. 



Micrococcus Aerogenes. — Forms large oval non-motile cocci. 

 It is very resistant to the action of acids, and in nutrient 

 media containing sugar it produces a large amount of gas. 

 This organism occurs in the intestine and in polluted water. 

 Cultural characters : 



Gelatine Plates. — Forms circular gray-white colonies. 



Gelatine Streak. — Forms a flat, gray-white, button-like 

 growth on the surface; in the depth a brownish-yellow 

 growth appears. After some time slight liquefaction of the 

 gelatine takes place. 



Agar- Agar. — A yellowish-white expansion forms. 



Potatoes. — A slimy gray-white growth forms. 



