176 STORRS AGRICULTURAL EXPERIMENT STATION. 
Gelatine colony.—A slowly liquefying colony, with a uniformly granular liquid. 
On litmus gelatine it is not acid. 
Gelatine stab.—A slow, stratiform, liquefaction, with a cloudy liquid and a 
scum. 
Agar streak.—Filiform, raised, smooth, translucent, white, moist, not 
luxuriant. 
Fermentation tubes.—No acidity, gas, nor closed arm growth in any sugar 
bouillon. 
Bouilion.—A turbidity and a thick, wrinkled scum, but no sediment. 
Milk.—No change in reaction, or amphoteric; the milk is curdled slowly and 
is later digested. 
Potato.—A luxuriant, white, much folded, dry or pasty growth. 
Grows at 20° and 37°. Aerobic. 
B. lactis gelatinosusn.s. A bacillus producing jelly-like milk. One culture 
of this organism was isolated from milk here and a second was sent from 
Geneva. Where the latter organism differs from ours the differences are indi- 
cated by brackets. : 
Morphology.—Size, .8u4x.64. [1.84x.64.] No chains, no spores, no cap- 
sule, and Gram stain negative. 
Gelatine colony.—A round, smooth, white colony, which slowly liquefies 
[rapid liquefaction], not characteristic. 
Gelatine stab.—Slow liquefier, cratiform, white. [Rapid liquefier. ] 
Agar streak,—A filiform, smooth, raised, brownish or cream-colored growth, 
luxuriant, moist. 
Fermentation tubes.—No acidity, gas, nor closed arm growth in any bouillon. 
[Slight acid reaction in lactose and some closed arm growth in saccharose. ] 
Bouillon.—A granular sediment, a turbidity and a membranous pellicle. 
Mitk.—Rendered acid and curdled, and upon digesting becomes a transparent 
jelly. 
Potato.—A moderate growth, raised, smooth, brownish with a slight odor. 
[Spreading.] 
Grows at both 20° and 37°. Aerobic. [Facultative anaerobic. ] 
B. lactis tenuis n. ». (Ducl.) Several cultures of xon-acid liguefying bacilli, 
with no wrinkling, and no rhizoid colonies have been studied. Here would 
belong Zy. tenuis, and Ty. Scaber of Duclaux. We describe two varieties 
from our cultures to which we have given the above names, derived from 
Duclaux. 
Morphology.—A slender rod. Size, 1.24x.54. No chains, no spores, no 
Gram stain. 
Gelatine colony.—A rapidly liquefying colony, not characteristic. 
Gelatine stab.—An arborescent needle growth and a stratiform, later ‘an 
infundibuliform, liquefaction, beginning in one day, half liquefied in ten days. 
