PLATE 8. 



Micrococcus pyogenes a. aureus. (Rosenbach.) Lehm. 



and Neum. 



(Staphylococcus aureus Ros.) 



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



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



III. Agar stab culture, five days at 22°. Stab canal. 



IV. Agar stab culture, five days at 22°; surface growth. 

 V. Agar plate culture, six days at 22°, natural size. 



Superficial and deep colonies. 



VI. Agar plate, six days at 22°. X 60. Small super- 

 ficial colony. 



VII. Gelatin plate, four days at 22°, natural size. 

 Superficial and deep colonies. 



VIII. Gelatin plate, four days at 22°. X 60. Super- 

 ficial and deep colonies. 



IX. Potato culture, six days at 22°. 

 X. Microscopic preparation. X 1000. From an agar 

 culture, two days old, at 22°. 



XI. Microscopic preparation. Single cocci, before, 

 during, and after division. X 1500. 



XI. 



