118 STORRS AGRICULTURAL EXPERIMENT STATION. 
Agar streak.—A spreading, thick, smooth growth of an orange color, some- 
what viscous. 
Fermentation tubes.—No acidity, no gas, no closed arm growth in any sugar 
bouillon. | 
Bourllon,—A sediment, turbidity and a pellicle. 
Milk.—No action on milk. 
Potato.—Luxuriant, thick, smooth, orange-brown. 
Grows:at 37°. Aerobic. 

S. lactis citreus [.n.s. A lemon-yellow, liquefying Streptococcus. 
Morphology.—A streptococcus. Size, .6u-1m. Gram stain positive. 
Gelatine colony.—A small colony, with clear liquid and slow liquefaction. 
Not characteristic. 
Gelatine Stab.—A slow liquefier with stratiform liquefaction. 
Agar streak.—A laxuriant, thin, lemon-yellow growth. 
Fermentation tubes.—No acidity, no gas, no growth in closed arm in any 
sugar bouillon. 
Bouillon.—A turbidity, a sediment, and a pellicle. 
Mitk.—Slightly alkaline, or no change in reaction, and a slight digestion. 
Potato.—Luxuriant, moderately thick, lemon-yellow. 
Grows best at 20°; less luxuriantly at 37°. Aerobic. 
The culture from which this was taken was from the centre of a cheese. 
Variety A.—A second culture from the same cheese near the surface, differed 
in producing an acidity in dextrose and saccharose, and no pellicle nor diges- 
tion of milk. 
Variety B.—¥rom Storrs; found in milk. Did not liquefy the gelatine plate, 
but produced a thin, flat colony, 2.5 mm. in diameter, 
! ariety C.—From milk in Middletown. Produced a slowly-liquefying, 
granular colony, 2-3 mm. in diameter; a wrinkled growth on agar; a pellicle 
upon bouillon, and a digestion of milk. 
Varieiy D.—Showed no potato growth, but an acidity in milk, although the 
milk digested. | 
Variety £.—¥rom cheese. Showed no potato growth and a very slow lique-_ 
faction, with no milk digestion. We have no hesitation in regarding them all 
as belonging to the same type. 

S. lactis Rogerin. s. A lemon-yellow, liquefying Streptococcus. 
Morphology.—Size, .74-1u. Gram stain irregular; chains produced. : | 
Gelatine colony.—A slow liquefaction, with a thin, transparent, granular | 
colony, at first white. Litmus gelatine is intensely alkaline, with a spindle- | 
shaped colony. 
Gelatine stab.—A needle growth and a stratiform liquefaction beginning in | 
one day. | 

A luxuriant, thick, lemon-yellow to brown growth. 
Fermentation tubes.—No acid, no gas, no growth in closed arm in any sugar 
bouillon. 
Agar streak, 

Louillon.—A sediment and turbidity. 


