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 bacilli contain spores. 



XIII. Bacilli with numerous fiagella. X 1000. Stained 

 by Loffler's method. 



XIII. 



