


LAoy STORRS AGRICULTURAL EXPERIMENT STATION. 
Bact, lactis rubrum. Non spore-bearing, pink Bacterium. This has not been 
found since its original description in 1899. Its characters, as then given, are 
as follows: 
Morphology.—Size, 2u-4ux.gu. Forming chains. No spores, no capsule. 
Gelatine colony.—A bead-formed colony, .7 mm. in diameter, with a granular 
edge. Liquefies with a nucleus and a clear zone. 
Gelatine stab.—A slow liquefier, stratiform, producing a clear: liquid with a 
scum and a sediment. 
Agar streak. 

Luxuriant, wrinkled, dull orange-yellow or pinkish. 
Bouillon.—A sediment, but no pellicle nor turbidity. 
Milk.—Becomes alkaline and curdles after several days at 37°. It digests 
into a dirty liquid. 
Potato.—Glistening, smooth, pink or salmon-colored, luxuriant. 
Grows at both 20° and 37°. 
Variety A.—Found later. Agrees with the above, except that it is of an 
orange rather than a pink color. 
Bact. lactis Burri n.s. A reddish, bitter milk organism, described by Burr 
and Dugelli. As described by them its characters are as follows: (Cent. f. 
Bacy Lily, XV., p. 700.) 
Morphology.—Size, 14-3"x.74. Nochains; no spores. Gram stain nega- 
tive. 
Gelatine colony.—Surface colony in a liquefying area, tg mm. in diameter. 
In fourteen days it is % mm. in diameter, of a clear brown color. 
Gelatine stab.—Begins to liquefy in four days; infundibuliform. 
Agar streak.—Luxuriant, smooth, lobed, reddish. 
fermentation tubes.—No acidity, gas, nor closed arm growth. 
Boutllon.—A turbidity, but no sediment nor pellicie. 
Milk.—Becomes acid, but does not curdle or digest. It becomes a rusty 
red, with a cheesy smell and, later, a bitter taste. . 
Potato.—No growth. 
Grows at 20° but not at 37°. ° Aerobic. 
Bact. lactis citronisn.s. A non spore-bearing, lemon-yellow Bacterium. 
Morphology.—Size, tux .6u, forming chains. No spores are produced, and © 
no capsules. 
Gelatine colony.—Small pits are produced, with a nucleus and a lighter outer 
zone, which may be variously streaked. 
Gelatine stab.—A slow liquefier, producing a cratiform liquefaction, with a 
dense sediment and a yellow liquid. At first clear, but later cloudy. 
Agar streak.—A luxuriant, thick, folded growth, at first greenish-yellow, and 
later lemon-yellow. | 
Bouillon.—A turbidity and a sediment. 
Mitk.—Becomes alkaline and digested into an amber-colored or pale yellow 
liquid. Sometimes it curdles before digestion. 
Potato.—Vhick, smooth, flesh-colored, and later lemon-yellow; or sometimes 
lemon-yellow from the start. 
Grows at both 20° and 37°. Aerobic. 
Bf 


