26 Synopsis of the Bacteria and Yeast Fungi. 



36. B. syncyanum (Ehrenberg), Schroter (I.e., p. 124). 



Vibrio syncyanus, Ehrenberg. 

 V. cyanogenus, Fuchs. 



Morphologically the same as the preceding. 

 Producing the " blue milk." 



The colouring matter is changed by potash or soda into a peach- 

 blossom red, while acids restore the original colour. Ammonia, on the 

 contrary, only slightly changes the blue to violet. 



37. B. seruginosum, Schroter (I.e., p. 122). 



In the so-called green or blue pus, which is at times 

 found in wounds, etc. Resembling B. Termo. 



Even in this case the actively moving Fungus cells are 

 themselves colourless; they secrete the colouring matter, 

 which is verdigris-green, often passing into blue, in the 

 matter which surrounds them. 



[38. B. violaceum (Bergonzini). 



Chromobacterium violaceum, Bergonzini (Ann. 

 Soc. Nat. Moden., xiv., 1880; see Bot. Cen- 

 tralbl., i. 1528). 



Rods isolated, motile, cylindrical, similar to those of 

 B. Termo, '6-1 p. thick, 2-3 fi long, of a violet colour. 



On solution of white of egg. Pigment insoluble in 

 water, slowly soluble in ether, rapidly in alcohol. The 

 ether dissolves out a red-violet colouring matter, the alcohol 

 a deep blue one.] 



VII. BACILLUS, Cohn (I.e., p. 173). 



Cells elongated cylindrical, almost always combined in 

 straight rod-like (not at all or slightly constricted} rows or 

 threads, increasing by transverse division. They form a 

 zoogloea, but often also occur in dense swarms, without the 

 secretion of gelatine. Reproduction by spores. 



