CHAPTER X. 



SPECIES OF SCHIZOMYCETES MENTIONED BY 

 WRITERS AND NOT DESCRIBED, OR NOT RE- 

 COGNISED AS DISTINCT SPECIES, IN THE PRE- 

 CEDING CLASSIFICATION. 



Micrococcus cyaneus, Cohn (Bacteridium 

 cyaneum, Schroter). Elliptical cells, growing upon 

 cooked potato, and producing a blue colour. In 

 nutrient solutions it forms zoogloea, which are at 

 first colourless, then bluish -green, and finally in- 

 tense blue. 



Micrococcus candidus, Cohn. Forms snow- 

 white points and spots, upon slices of cooked 

 potato, 



Micrococcus indicus, Koch. Round cells, 

 which grow upon sterilised potato, forming a ver- 

 milion layer (Plate XV., Fig. i). In nutrient agar- 

 agar the appearances are very characteristic. In 

 a pure cultivation a brilliant, vermilion-coloured 

 reticulated pellicle develops on the surface (Plate 

 II., Fig. i). In the track of the needle beneath the 

 surface no pigment is formed (Plate XIII., Fig. 

 i). Cultivated in nutrient gelatine it liquefies the 

 medium, and colours it crimson. The growth, of 



