38 STORRS AGRICULTURAL EXPERIMENT STATION. 
Gelatin stab; a good needle growth, with a thick yellow orange surface 
growth. 
Agar and potato, thick, moist, glistening yellow, of a very deep orange shade. 
Milk, no effect produced on milk. 
Nos. 162 and 141. 
See the same numbers under Group III. They are listed here also, since 
the pigment sometimes approaches an orange color rather than a lemon yellow. 
No. 169. (Rare.) 
Morphology, a bacillus, size, .5u by t#. Has an irregular stain, with light 
spots in the middle that are’ not true spores. On potato they grow to a length 
of 4u, with square ends, still showing irregular stain. 
Gelatin plate; deep colonies are round and yellow, with a dark center and a 
yellow rim. Surface colonies are about .5 mm. in diameter. They are yellow 
and transparent, the transparent colony being the most distinctive character. 
Gelatin stab; an abundant needle growth, with a thin, widely spreading, 
transparent surface. 
Agar, an orange yellow, transparent, moist growth. 
Potato; A widely spreading, moist, orange growth, sometimes very deep in 
color and almost brown. 
Bouillon, orange flakes appear on the surface, and later a yellowish sediment. 
Milk; is not curdled, but an orange scum and an orange sediment are pro- 
duced, and the milk rendered alkaline. 
No. 170. B. aureus acidi. (n. sp.) 
Morphology, a bacillus, size, .6u by .7m. Occasionally somewhat longer. 
Gelatin plate; colonies under the surface round, yellowish and _ slightly 
Opaque. Surface colonies rather transparent, spreading, slightly irregular, 
1.5 mm. in diameter, and of an orange color. 
Gelatin stab; a deep, dry pit is produced, with a dry orange yellow skin 
lining the pit. 
Agar and potato; both show an orange yellow growth. 
Milk, is curdled in from two to four weeks into a moderately hard curd, 
which ts acid, showing no whey and having no digestion. 
No. 205. 8B. aureus lactis I. (n. Sp.) 
Morphology, a bacillus, size, .6u by Im, with rounded. ends. No chains, 
though three or four may adhere together. 
Gelatin plate; under the surface a yellowish orange, slightly irregular colony. 
On the surface an orange bead, .5 mm. in diameter, which is in the middle of a 
slightly depressed ring, but no liquefaction of gelatin occurs. 
Gelatin stab; a good needle growth and a slight orange surface growth 
appears. 7 
Agar; a moist, thick, smooth ground glass growth, orange yellow in color. - 
Potato, a dry, or moist, orange growth. 
Bouillon; an orange yellow, tenacious scum appears with a clear liquid. 
Milk; no effect produced, except an orange scum and an alkaline reaction. 
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