LIST OF ILLUSTRATIONS. 



PLATES. 



PLATE 



I. Bacteria, Schizomycetes, or Fission-fungi . . Frontispiece 



II. Cultivations on nutrient agar-agar. 

 Fig. I. Bacterium indicum. 

 ,, 2. Bacillus cyanogenus. 

 ,, 3. Bacterium prodigiosum. 



III. Cultivations in nutrient gelatine. 



Fig. I. Spirillum choleroe asiaticse. 

 ,, 2. Bacterium cholerse gallinarum. 

 ,, 3. Streptococcus cereus albus. 



IV. Cultivations in nutrient gelatine. 



Fig. i. Micrococcus tetragonus. 

 ,, 2. Bacterium pneumonise crouposae. 

 ,, 3. Saccharomyces niger. 



V. Cultivations in nutrient gelatine. 

 Fig. I. Bacillus pyocyaneus. 

 ,, 2. Sarcina lutea. 

 ,, 3. Bacillus anthracis. 



VI. Plate-cultivation. 



First attenuation of the Spirillum Finkleri after twenty-four 

 hours. 



VII. Plate-cultivation. 



Second attenuation of the Spirillum Finkleri after thirty-six 

 hours. 



VIII. Cultivations on nutrient agar-agar. 

 Fig. I. Sarcina lutea. 

 ,, 2. Streptococcus pyogenes aureus. 

 ,, 3. Bacillus pyocyaneus. 



IX. Potato-cultivations. 



Fig. I. Bacterium prodigiosum. 

 ,, 2. Penicillium glaucum. 



b 



