46 STORRS AGRICULTURAL EXPERIMENT STATION. 
No. 118. (Rare.) M. giganteus lactis. (n. sp.) 
Morphology; extremely large coccus, 1.5 in diameter. 
Gelatin plate; produces an opaque, white bead. Not characteristic. 
Gelatin stab; an abundant needle growth, but no surface growth. 
Agar and potato; no visible growth, and the same is true of bouillon. 
Milk; produces no effect upon milk, 
The essential characteristics of this organism are its very great stze and its 
markedly anaerobic characters. One type, probably the same, produces a very 
slight acid reaction in the milk after four weeks growth, sufficient to curdle the 
milk when heated. 
No. 47. (Uncommon.) 
Morphology; .6u in diameter. 
Gelatin plate; a round, raised, white bead, 1 mm. in diameter, 
Gelatin stab; an abundant needle growth, with a thick, moist but not widely 
spreading surface. 
Potato and agar; snow white, moist growth. 
No. 121. (Somewhat common.) JM. arborescens lactis. (n. sp.) 
Morphology; diameter, .7u, No chains. 
Gelatin plate; deep colonies are irregular, granular, with a broken fuzey 
edge. On the surface they are more regular, and become 1 mm. in diameter. 
There is great variation in density and in the amount of irregularity. 
Gelatin stab; needle growth with radiating fibers. The surface growth is 
white, not thick, and spreads over the surface. 
Agar and potato; not characteristic. 
Bouillon; a very tough, tenacious scum is formed, which does not sink in the 
liquid. 
No, 85, (Somewhat common.) 
Morphology; .6« in diameter. 
Gelatin plate; a transparent bead, with a darker center and a scolloped 
border, I mm. in diameter. This bead is rather transparent, and spreads. 
slightly. . 
Gelatin stab and agar; not characteristic. 
Potato; thick and whitish, or yellowish, or sometimes creamy white. In 
cream the organism produces a pleasant odor, but butter made from it has no. 
flavor or aroma. 
GROUP VI. MICROCOCCI. LIQUEFYING, BUT NON-CHROMOGENIC. 
No. 167. (Somewhat common.) MW, citreus lactis. (n. sp.) 
Morphology; a coccus, 1m in diameter, in groups of 4, or irregular masses. 
Gelatin plate; produces an opaque bead in a slight depression, which in- 
creases to I mm. in diameter, then sinks in a pit, in which the bead remains. 
for some time in the center as a raised mound. The pit may be granular and 
either circular or lobed. 

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