
CLASSIFICATION OF DAIRY BACTERIA. 163 
Miltk.—The milk is curdled with a slight green color at ithe top, but there is 
no apparent digestion. 
Potato.—A luxuriant, white to brownish growth, with no discoloration. 
Grows at both 20° and 37°, but the green color does not appear at 37°. 
Aerobic. 
B. lactis fluorescens ITT. n. s. A Sreen, non-fluorescent lophotrich. This 
organism does not produce a fluorescence, but the fact that it turns milk green 
suggests the relationship to the last organisms, and hence we class it here. 
Morphology.—A slender rod.* Size, T.5é-3u4x .4u-.7u. No chains, no 
spores, no capsules. Gram stain negative. 
Gelatine colony.—A very rapidly liquefying colony, uniformly granular, but 
'. not characteristic. 
Gelatine stab.—Begins to liquefy in two days, stratiform. 
Agar streak.—Luxuriant, spreading, flat, smooth growth, gray-brown, moist. 
fermentation tubes.—Acidity and closed arm growth in dextrose and some- 
times lactose, but not in saccharose. No gas produced. The liquid is usually, 
though not always, green. 
Bourlion.—A sediment, slight turbidity, and a membranous pellicle. 
Milk.—Becomes alkaline, curdles, and digests. The digested liquid is green 
or yellow in color, and has a strong odor. 
Potato.—Growth scanty, but the potato is discolored. 
Grows at both 20° and 37°. Facultative, anaerobic. 
-B. lactis moruloideus n. s. 
Morphology.—Size, 1u-1.54x 1.24. No chains, spores, or capsules. Gram 
stain irregular, frequently showing only a single flagellum. 
Gelatine colony.—A slowly liquefying pit, which is lobed and moruloid, with 
a putrefactive odor. In Atmus gelatine it is not acid. 
Gelatine stab.—A needle growth, and a stratiform liquefaction, beginning in 
one day, and never complete. 
Agar streak.—Filiform, raised, smooth, rather opaque, white, moist, not 
luxuriant. 
Fermentation tubes.— Dextrose is acid but no other sugar bouillon. Occasion- 
ally growth in closed arm, but no gas. _ 
Bouillon.—A sediment, turbidity, and a pellicle. 
Milk.—Is rendered acid and curdled with a subsequent digestion, with a 
strong odor and a yellowish color. 
Potato.—Scanty, thin, smooth, white, moist; no discoloration. 
Grows at 20°; very slightly at 37°. Facultative anaerobic. 
* Frequently appearing monotrichic, from the breaking away of some of the flagella. 
