PLATE 69. 



Leptothrix epidermidis. Biz. 



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

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



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



IV. Agar stab culture, two days at 22°. Surface 

 growth. 



V. Agar plate, two days at 22°. Natural size. 

 VI. Agar plate, two days at 22°. X 90. Part of a su- 

 perficial colony. 



VII. Agar plate, two days at 22°. X 90. Deep colony. 

 VIII. Gelatin plate, two days at 22°. Natural size. 

 IX. Gelatin plate, one day at 22°: (e) Superficial, (i) 

 deep colony. 



N. Potato culture, three days at 22°. Natural size. 

 XI. Microscopic preparation. Pure culture on agar, 

 two days at 22°. X 1000. Stained with fuchsin. 



XII. Microscopic preparation. Bouillon culture in hang- 

 ing drop, two days at 22°. X about 1000. 



