PLATE 43. 



Bacillus mesentericus: Lehm. and Neum. (B. mesen- 



tericus fuscus Fliigge.) 



I. Gelatin stab culture, two days at 22°. 

 II. Agar streak culture, three days at 22°. 



III. Potato culture, one day at 22°. Natural size. 



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

 V. Agar plate, two days at 22°. Natural size. 



■VI. Agar stab culture, four days at 22°. Surface 

 growth. 



VII. Agar plate, two days at 22°. X 60. Above, super- 

 ficial ; below, deep colonies. 



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

 Deep colonies. 



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

 perficial colony. 



X. Gelatin plate, two days at 22°. Natural size. 

 XI. Gelatin plate, one day at 22°. X 60. To the right, 

 deep; to the left, superficial colonies. 



XII. Microscopic preparation. X 800. From a pure 

 culture on agar two days old. Stained with fuchsin. 

 Some baciUi contain spores. 



XIII. Bacilli with numerous flagella. X 1000. Stained 

 by Loffler's method. 



XIII. 



