CLASSIiflCATlON 



59 



Cerned with the first three famihes, the generic character- 

 istics in these only will be given. The full classification as 



Fig. 58. — Illustrates the genus Beggiatoa. The filament A is so full of 

 sulphur granules that the individual cells are not visible. B has fewer 

 sulphur granules. In C the granules are nearly absent and the separate 

 cells of the filament are seen. (After Winogradsky, from Lafar.) 



well as a thorough discussion of this subject is given in 

 Lafar's Handbuch, whence the following is adopted: 



ORDER I. EUBACTERIA. 



--J it nuclei, free from sulphur granules and from 

 „„.v,^^xiw^.uipurin (p. 100); colorless, or slightly colored. 



1. Family: Coccace^ (Zopf) Migula, all cocci. 



Non-flagellated, 

 non-motile 



Flagellated, 

 motile 



Genus 1. Streptococcus Billroth: division in one plane only 



(Fig. 48). 

 " 2. Micrococcus (Hallier) Cohn:- division in two 



planes only (Fig. 49) . 

 " 3. Sarcina Goodsir: division in three planes only 



(Fig. 50). 

 " 4. Planococais Migula: division in two planes only. 

 " 5. PZanosorcina Migula: division in three planes only. 



2. Family: Bactehiace^ Migula, all bacilli. 



Genus 1. Bctcterium (Ehrenberg) Migula: no flagella; 



non-motile. 

 " 2. Bacillus (Cohn) Migula: flagella peritrichic 



(Fig. 51). 

 " .3. Psevdomonas Migula: flagella at the end: mono- 



trichic, lophotrichic, amphitrichic (Fig. 52). 



