PLATE 38. 

 Bacillus mycoides. Fliigge. (Eoot Bacillus.) 



I. Agar plate, one day at 22°. X 20. Superficial and 

 deep colony. 



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



III. Microscopic preparation. Pure culture, twenty- 

 four hours old, on agar. X 1000. Stained with fuchsin. 

 A few bacilli contain spores. 



IV. Agar plate, one day at 22°. X 100. Part of a 

 superficial colony. 



Bacillus butyricus. Hiippe. (Butyric Acid Bacillus.) 



V. Potato culture, three days at 22°. 

 VI. Gelatin plate, one day at 22°. X 60. Above, su- 

 perficial; below, deep colonies. 



VII. Gelatin plate, thirty-six hours at 22°. X 60. 

 Part of a superficial colony. 



VII A. Flagella preparation. X 1000. Stained accord- 

 ing to Loffler. 



VII A. 



Bacillus vulgatus. Migula. (B. mesentericus vulgatus 

 Fliigge. Potato Bacillus.) 



VIII. Potato culture, five days at 22°. 

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

 Both forms of growth occur. 



