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. 



