Explanation of Plate 57. 



SPIRILLUM RUBRUM. v. Esmarch. 



I. Agar stick culture, ten days at 22. 

 II. Agar streak culture, twenty days at 22. 



III. Agur plate, five days at 22. x 60. e, Super^ 



ficial; i f deep colony. 



IV. Gelatin plate, seven days at 22. x 60. e, Su- 



perficial ; i, deep colony. 



V. Microscopical preparation. Pure culture in ten- 

 fold diluted bouillon, two days at 37. x 

 1,000. Stained with fuchsin. 



V. a, Flagella preparation of spirillum rubrum. 

 X 1,000, Loftier' s stain. 



V. a 



SPIRILLUM CONCENTRICUM. Kitasato. 



VT. Agar plate, seven days at 22. x 60. e, Super- 

 ficial; i } deep colony. 



VII. Gelatin plate, three days at 22. x60. e, Su- 

 perficial; i, deep colony. 



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

 IX. Microscopical preparation. Pure culture in bouil- 

 lon, two days at 37. x 1,000. Fuchsin stain. 



57 



