144 STORRS AGRICULTURAL EXPERIMENT STATION. 
Gelatine colony.—A very slowly liquefying colony, not characteristic; some- 
times the gelatine dries before liquefaction takes place. 
Gelatine stab.—Begins to liquefy in three days, and is about 1¢ liquefied in 
twenty-one days. Napiform and stratiform. ; 
Agar streak,—Filiform, raised, smooth, opaque, cream-white, shining, luxuri- 
ant, viscous. 
Fermentation tubes.—No acidity, gas, nor closed arm growth. 
Lourllon.—A sediment, turbidity and pellicle. 
Milk.—Becomes alkaline, is curdled, or sometimes digests without curdling. 
The digested milk is very slimy and of a slight straw color (in one culture, pink). 
Potato.—A very abundant, spreading, convex, smooth, brown growth; potato 
discolored. 
Grows at 20° and 37° abundantly. Aerobic. 
Variety A.—An organism found in the pink slime on Camembert cheese 
closely resembles this, but differs in the following: It is not viscous on agar, 
nor does it make milk slimy. It produces no pellicle in bouillon, and neither 
curdles nor digests milk. 
II. Acid in dextrose or other sugars. 
Bact. lactis musct. An arborescent bacterium with myceloid colonies. This 
was found in milk in Middletown, in cheese, and one culture was sent from 
Kiel isolated from Mazoon, Perhaps identical with Bact. mycoides (Fligge). 
Morphology.—Long filaments made up of rods 3ux1Im. Central spores no 
larger than the rods. Gram stain positive. 
Gelatine colony.—Myceloid, branching, radiating colonies before liquefaction. 
Commonly forming a thin, white, velvety, or ground-glass surface upon the 
liquefying gelatine. Lztmus gelatine is not acid. 
Gelatine stab.— There is at first an arborescent needle growth, but liquefaction 
begins in one day, and a wrinkled glass-like surface is formed. 
Agar streak,—Luxuriant, thin, white, wrinkled. In one culture threads grow 
down into the agar, and the agar turns dark colored. © 
Fermentation tubes.—Growth is somewhat variable. In one culture dextrose 
is rendered acid with a closed arm growth in all sugar bouillons. In another 
culture dextrose and saccharose are acid, and there is no closed arm growth. 
No gas. 
Bouillon.—A turbidity, sediment and pellicle, except in one culturé where 
the pellicle is wanting. | 
Milk.—Curdles with amphoteric reaction and subsequently completely di- 
gested. 
Potato,—Luxuriant, thin, whitish, sometimes wrinkled; potato may be dis- 
colored. 
Grows at 20° and 37°. Aerobic. 
Variety A.—One culture was sufficiently different to be separately tabulated. 
The differences are. as follows: Size, 2.54x1.4u. Gram stain negative. 
The gelatine colony shows masses of bacteria hanging together. They are 
arborescent under mica. A dry pit formed in gelatine stab. Agar growth not 
wrinkled. No closed arm growth. The reaction of milk is alkaline. Here 
belong Nos. 14 and 16 of Adametz. 




