PLATE 21. 

 Bacterium prodigiosum (Ehrenb.). Lehm. and Neum. 



I. Gelatin stab culture, one day at 22°. 

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

 III. Agar stab culture, iour d&js at 22°. Stab canal. 

 TV. Agar stab culture, four days at 22°. Surface growth. 

 V. Agar plate, from two to four days at 22°. Natural 

 size. Colonies with and without color. 



VI. Agar plate, eight days at 22°. X 60. Superficial 

 colony reddish, deep one yellowish. 



VII. Gelatin plate, two days at 22°. X 60. Superficial 

 colony just beginning to sink in. 



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

 IX. Potato culture, eight days at 22°. Typical with 

 metallic luster on the surface. 



X. Potato culture, eight days at 22°. Atypical white 

 growth. 



XI. Microscopic preparation. Pure culture from agar. 

 X 800. Stained with fuchsin. 



XII. Bacteria with several flagella. X 1000. Stained 

 according to LofHer. 



XII. 



