THE LOWER BACTERIA 



13 



156 



Fio. 1. 1. Coccus. 2. Streptococcus. 3. Staphylococcus. 4. Capsulated diplococcus. 

 5. " Biscuit "-shaped coccua. 6. Tetrads. 7. Sarcina fonn. 8. Types of bacilli 

 (1-8 are diagrammatic). 9. Non-septate spirillum x 1000. 10. Ordinary spirillum 

 (a) comma-shaped element ; (t>) formation of spiral by comma-shaped elements 

 x 1000. 11. Types of spore formation. 12. Flagellated bacteria. 13. Changes in 

 I.;K trria produced by plasmolysis (after Fischer). 14. Bacilli with terminal proto- 

 plasm (liutschli). 15. (a) Bacillus composed of five protoplasmic meshes; (6)proto- 

 plMmio network in micrococcus (Biitschli). 10. Bacteria containing metachromatic 

 granules (Ernst, Neisser) some contain polar granules. 17. Beggiatoaalba. Both 

 filaments contain sulphur granules one is septate. 18. Thiothrix tennis (\Vino- 

 ki). 19. Leptothrix innominate (Miller). 20. Cladothrix dichotoma (Zopf). 

 .M. Stn-jttuthrix a<-tiiii)mvces(Bostr6m), (a) colony under low power; (b) filament 

 >li(.\vin; true branching ;' () filament containing coccus-like bodies; (d) filament 

 with chili at end. 



