PLATE 31. 

 Bacterium vulgare (Hauser). Lehm. and Neum. (Pro- 

 teus vulgaris Hauser.) 



I. Gelatin stab culture, twenty-four hours at 22°. 

 II. Agar streak culture, thirty-six hours at 22°. 



III. Agar plate, thirty-six hours at 22°. Natural size. 



IV. Agar plate, four days at 22°. X 60. Above, super- 

 ficial ; below, deep colonies. 



V. Gelatin plate, thirty-six hours at 22°. Natural 

 size. 



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

 the right, superficial; to the left, deep colonies. The lower, 

 approaching the surface, begins to liquefy. 



VII. Gelatin plate, three days at 22°. X 60. Deep 

 colony. Zooglea form, similar to the Bact. Zopfii. 



VIII. Microscopic preparation. Pure culture upon agar. 

 X 800. Stained with fuchsin. 



IX. Bacteria with very numerous flagella. X 1000. 



