FORMS OF BACTERIA. 



A. Cocci. B. Bacilli. 



A. Cocci: (a) Micrococcus; (b) Diplococcus; (c) Tetracoccus; (d) Sarcina; (e) Streptococcus; 

 (f) Staphylococcus; (g) Ascococcus; (h) Zob'gloea. 



B. Bacilli: (a) Single cells; (b) Filaments; (c) Cells with round, pointed, and truncate ex- 

 tremities; (d) Polar spore; (e) Glostridium with central spore. 



C. Spirilla. D. Pleomorphous Forms. 



C. Spirilla: (a) Spiral filament; (b) Comma-shaped cells. 



D. Pleomorphous forms: (a) Spirulina; (b) Leptothrix; (c) Cladothrix. 



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