CLASSIFICATION OF THE BACTERIA. 85 
with globular articles, ShOEE > diameter 1 », united in 
Beatty of 50 p. 
Decomposes racemic acid, causing the right 
tartaric acid to disappear, and setting free left 
tartaric acid. 
MICROBACTERIA CHROMOGENES, 
B. Datei, Schroeter (Vibrio synxanthus, Ehrb.). 
‘* Bodies cylindrical, slightly flexible, formed of cor- 
puscles rarely exceeding five in number; length of 
an article, 0.7 to 1 ». In tainted cow’s milk, to which 
it gives a yellow color.” 
B. syncyanum, Schroeter (Vibrio syncyanus, Ehrb.). 
This Bacterium, which has the same charac- 
ters as the preceding, has been observed in sour 
milk, to which it gives a blue color. 
B. eruginosum, Schroeter. 
In greenish blue pus. 
These B. chromogenes resemble entirely the 
lactic vibrios, B. termo or catenula. According 
to Robin, colored milk contains colorless vibrios, 
and the coloration is due to an alga similar to 
Leptomitus. 
B. brunneum, Schreeter. 
Rods in a brown coloring matter in infusions 
of rotten corn. 
Following the colored Microbacteria, I place 
two species of Bacteriwm recently described by 
Ray-Lankester and Warming. 
B. rubescens, Ray-Lank., 1873. ) 
Under this name Ray-Lankester has described 
