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. 



X. 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. 



