





CLASSIFICATION OF DAIRY BACTERIA. 63 
B. mycoides of Fliigge, although each shows distinct points of difference from 
Fliigge’s organism. I have therefore named them &. mycotdes lactis I., [1., 
Ill. 
No. 102. (Common.) &. mytotdes lactis TZ. (n. sp.) 
Morphology; 1% by 2u in length, forming long chains with oval spores. 
Gelatin plate; deep colonies are at first irregular and show irregular radiating 
fibers. A proteus-like colony. ‘The surface colonies form a pit with a large 
nucleus and a loosely granular outer zone. Liquefaction slowly extends. 
Gelatin stab; a narrow funnel broadening at the top is formed, with a dense 
sediment. It liquefies then over the surface of the gelatin, and the liquefaction 
deepens uniformly with a very granular liquid containing a dense white sediment. 
Agar; growth is tough and dry and éroken easily into fragments, Later 
becomes very white from being covered with spores. 
Potato; dry and rough and even, becoming sow white. 
Milk; curdles in two days at 36° into a soft curd, faintly alkaline. Curdles 
also at 20°. Digests slowly producing a rancid odor. The digested liquid is 
colorless, though when the digestion is complete the liquid may be amber col- 
ored. It is without effect upon the flavor or aroma of butter. 
No. 124. (Common.) &. mycotdes lactis Z7. (n. sp.) 
Morphology; size, 14 by 2. Grows into long threads. The individual 
elements show square ends. A capsule is developed and large spores are 
prominent. 
Gelatin plate; a pit is formed in which a tangled mass of threads is formed 
very much “ke anthrax colonies. It is quite characteristic. Becomes half a 
millimeter in diameter and then liquefies. 
Gelatin stab; a shallow funnel is produced which liquefies in a horizontal 
layer. The liquid is clear with a dense scum and a dense sediment. 
Avar; a tough, white growth is formed, readily breaking into lumps. 
Potato; growth thin and dry, almost snow white, commonly a pztty-like 
texture. 
Milk; curdles rapidly at 36° in one day and at 20° ina week. Digests into a 
cloudy liquid which is colorless or amber colored. 
No. 111. &. mycoides lactis (17, (n. sp.) 
Agrees with No. 124 except in the following points: 
Gelatin stab; peculiar radiating growth arises from the needle track. This is 
unlike the common “‘fir tree” type, inasmuch as the radiating growths are in 
branches and are as long at the top as at the bottom of the gelatin. ‘They 
grow moreover obliquely rather than horizontally. Later the liquefaction 
begins and is finally complete. 
Potato; this grows into a dry, velvety, spreading growth all over the surface. 
Later becomes very snow white and dry. 
No. 138. (Rare). 
Morphology; size, 14 by 2u to 34, Forming long threads in bouillon. Rods 
with square ends. 
