56 R. E. BUCHANAN 



Slender rods which stain with difficulty, but when once stained, 

 are acid-fast. Clubbed, swollen, clavate or cuneate cells occur, even 

 filaments with branches. Non-motile. Without spores. Gram- 

 positive. 



The type species is Mycobacterium tuberculosis (Koch) Leh- 

 mann and Neumann. 



Vuillemin (1913 p. 527) contends that Coccothrix resembles too 

 closely Coccotrichum Wallroth. It does not seem that the 

 resemblance is close enough ever to cause confusion, and the 

 genus name Coccothrix is apparently valid. The Committee 

 on Classification of the Society of American Bacteriologists, 

 however, has recommended the use of the generic name 

 Mycobacterium as better known and less likely to result in 

 confusion. 



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Beijerinck, M. W. 1901b Sur les Ferments Lactiques de I'lndustrie. Arch. 

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