Explanation of Plate 42. 



BACILLUS MYCOIDES. Fliigge. 

 (Root bacillus.) 



I. Agar plate, one day at 22. x20. Superficial 



and deep colony. 



II. Potato culture, seven days at 22. Natural size. 

 III. Microscopical preparation. Pure agar culture, 

 twenty -four hours. Fuchsin stain, x 1,000. A 

 few bacilli show spores. 



IV. Agar plate, one day at 22. xlOO. Superficial 

 and deep colony. 



BACILLUS BUTYBICUS. Htippe. 

 (Sutyric-acid bacillus. ) 



V. Potato culture, three days at 22. 

 VI. Gelatin plate, one day at 22. x60. Above, su- 

 perficial ; below, deep colony. 

 VII. Gelatin plate, one and a half days at 22. x60. 



Part of a superficial colony. 

 VII. a. Flagella preparation, x 1,000. Loffler's stain. 



BACILLUS VULGATUS. Migula. 



(Bacillus mesentericus vulgatus Fltigge. Potato 

 bacillus.) 



VIII. Potato culture, five days at 22. 

 IX. Potato culture, five days at 22. Natural size. 

 Both forms of growth occur. 



VII. a. 



