PLATE 55. 

 Spirillum rubrum. Von Esmarch. 



I. Agar stab culture, ten days at 22. 

 II. Agar streak culture, twenty da*ys at 22. 



III. Agar plate, five days at 22. X 60. (e) Super- 

 ficial, (i) deep colonies. 



IV. Gelatin plate, seven days at 22. X 60. (e) Su- 

 perficial, (i) deep colonies. 



V. Microscopic preparation. Pure culture from bouil- 

 lon, diluted ten times; two days at 37. X 1000. Stained 

 with fuchsin. 



V A. Flagella preparation of spirillum rubrum. X 1000. 

 Stained according to Loffler. 



V A. 



Spirillum concentricum. Kitasato. 



VI. Agar plate, seven days at 22. X 60. (e) Super- 

 ficial, (i) deep colonies. 



VII. Gelatin plate, three days at 22. X 60. (e) Super- 

 ficial, (i) deep colonies. 



VIII. Agar plate, seven days at 22. Natural size. 



IX. Microscopic preparation. Pure culture in bouillon, 

 two days at 37. X 1000. Stained with fuchsin. 



