40 STORRS AGRICULTURAL EXPERIMENT STATION. 3 
No. 116. 2B. lactis erythrogenes. Variety II. 
Morphology, a large coccus, .8u in diameter. 
Gelatin plate; the colony is at first a bead, or flat and brownish under the 
microscope. Grows into a flat colony, 1.5 mm. in diameter, in four days, and 
then sinks into a shallow pit. 
Gelatin stab; an abundant needle growth, white, with a flat, white surface 
growth sinking into a shallow pit, the bacteria mass forming a dense scum on 
the surface of the liquefying gelatin. Liquefaction occurs slowly and hori- 
zontally. 
Agar, a thick, white, opaque growth, giving to the agar a pinkish tinge, 
which later becomes somewhat red. The growth on the surface becomes yellow. 
Potato, an abundant yellow, moist, opaque skin. 
Milk, is rendered slightly alkaline, but not curdled. After four weeks it is 
digested into a watery or semi transparent liquid, yellowish in color, with a 
peculiar smell. It produces no effect upon butter when used for cream ripening. 
No. 174, (Uncommon.) 
Morphology, a bacillus, size, .gu by 1.54, with rounded ends. No chains, 
though three or four may hang together. | 
Gelatin plate; the deep colonies are oval, dark, opaque, and the surface 
colonies are at first white and about half a millimeter in diameter, thin, sinking 
into a pit, with a large, yellowish nucleus. 
Gelatin stab; a moderately shallow funnel is produced, gradually liquefying, 
with a cloudy liquid and abundant sediment, but no scum. 
Agar, slightly lemon yellow growth on the surface, and the agar acquires a 
pink tinge. 
Potato; white or yellow growth, which later becomes quite abundant and 
lemon yellow. - 
Milk; curdles at body temperature in three days into a soft, alkaline curd. 
Digests into a cloudy, colorless mass, which sometimes may be reddish yellow 
or amber colored, and with a slimy scum. 
This organism is very similar to No. 116, above described, and is perhaps 
identical with it. The pink fluorescence is very slight, and the lemon yellow 
color more noticeable, and this has led me to separate the two. 
201, Sarcina lutea, and No. 199, sarcina Fagg, have both been found 
eee in dairy products. 
No. 117. (Rare.) Micrococcus citreus lactis. (n. sp.) 
Morphology; a coccus, .guin diameter. , 
Gelatin plate, a smooth, opaque surface colony, I mm. in diameter, which 
in about five days becomes 2.5 mm. in diameter; very thin and flat and de- 
cidedly yellow, Gelatin ordinarily becomes dry before liquefaction begins. 
Gelatin stab; needle growth abundant. A flat, depressed, yellow surface 
growth, which is sunken in the middle and slowly spreads over the surface of 
the gelatin. After about two weeks a slow liquefaction begins, with a floating 
scum on the surface of the liquid. (One variety of this species was found 
which liquefied the gelatin more rapidly and produced a narrow funnel.) 
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