420 



ALFRED H. RAHE 



TABLE 6 



Scheme for the classifiialion of the aciduric bacilli including the aciduric phase of 



B. bifidus 



+ = fermentation of carbohydrate or clotting of milk. 

 G = gas formation. 



=*= = positive reaction in some instances negative in others. 

 — = no growth. 



CONCLUSION 



The aciduric bacilli, including B. bifidus in its aciduric phase, 

 may best be classified in accordance with their abilities to fer- 

 ment certain carbohydrates. 



REFERENCES 



Clark, W. M. 1916 The acid production of B. bulgaricus. Proc. Soc. Am. 



Bact. 59. 

 Howe, P. R. 1917 Microorganisms of dental caries. J. Med. Research, 31, 481. 

 Hastings, E. G. 1908 A preliminary note on a group of lactic acid bacteria 



not previously described in America. Science, 28, 656. 



