PLATE 55, 



Spirillum rubrum. Von Esmarch. 



I. Agar stab culture, ten days at 22°. 

 II. Agar streak culture, twenty days 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 f uchsin. 



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

 Stained according to Loffler. 



V A. 



Kitasato. 

 X 60. (e) Super- 



Spirillum concentricum. 



VI. Agar plate, seven days at 22° 

 ficial, (i) deep colonies. 



VII. Gelatin plate, three days at 22' 

 ficial, (i) deep colonies. 



VIII. Agar plate, seven days at 22°. 

 IX. Microscopic preparation. Pure culture in bouillon, 

 two days at 37°. X 1000. Stained with f uchsin. 



X 60. (e) Super- 



Natural size. 



