GENERAL MORPHOLOGY AND PHYSIOLOGY 



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FIG. 5. Illustrating the general morphology of Coccaceae. a, b, ' micrococci (a) 

 differing in size, showing chain formation or streptococci (b); c, diplococcus; d, diplococ- 

 cus; e, tetracoccus ; /, gelatinized tetracoccus; g, gelatinized diplococcus. 



PIG. 6. General morphology of Bacteriaceae. a, b, c, d, bacilli differing in size and 

 form; c, shows curved bacilli like those of Asiatic cholera; e, hay bacillus (B. subtilis); 

 /, Y-shaped or branched bacilli, as of clover root nodules; g, drum-stick (Trommel- 

 achlager) bacilli, as of tetanus form due to the enlarged endospores. 



