PLATE XIII. 



FIG. i. Sarcina lutea. 



In this tube and the two adjacent ones, the inoculations 

 were made by thrusting the needle into the nutrient 

 agar-agar. In all three cases the growth on the 

 surface, freely exposed to air, developed a charac- 

 teristic pigment, while the growth in the track of 

 the needle was scanty and colourless. 



FIG. 2. Bacterium indicum. 



Micrococcus indicus. 

 Bacillus indicus. 



FIG. 3. Saccharomyces rosaceus. 



Pink torula. 



