


CLASSIFICATION OF DAIRY BACTERIA. 55 
194. (Very common.) B&B. communis lactis J. (n. sp.) 
Morphology, size, .6" by .8u. 
Gelatin plate; a smooth, round, white colony, not very opaque, becoming 
3 mm. in diameter, irregular and rough or lobate, or sometimes round, white, 
moist and regular. 
Gelatin stab; needle growth abundant. A white,, flat, glistening surface 
“growth, which is first thin, but later becomes thicker and slightly yellow. 
we 
Agar, moderately thick, moist, smooth and transparent. 
Potato; white, moist and thick. 
Milk; no effect upon milk or cream. 
This is very common in milk, though never in great numbers. It is the same 
as No. 55. Previously described. (Storrs Sta. Rep., 1893.) 
No. 191. 3B. radiata lactis. (n. sp.) (Named also B. citreus arborescens 
on p. 43.) 
Morphology, size, .8u by 44. No long chains, but two or three may be 
united together. Surrounded by an unstained capsule. 
Gelatin plate; widely spreading colony, with fine lines radiating from the 
center. Grows over the whole plate, with fibers permeating the gelatin. The 
fibers are knobbed. Fibers from two colonies may grow over the whole 
“plate in the course of three days. To the naked eye the whole looks like a 
“mould. ®. 
Gelatin stab; a slight needle growth, with a characteristic ground glass 
surface growth. 
Agar, not characteristic. 
Potatv,; a very thin growth, which may be slightly lemon yellow. 
Milk; after three weeks is rendered slightly alkaline and semi-transparent. 
This organism was found only once, and was unfortunately lost before its 
description was complete. Its very unique colony upon gelatin is, however, 
‘sufficient to distinguish it. . 
No. 74. (Rare.) Proteus Zenkert. (?) 
Morphology, size, tu by 2@ to 34, forming long threads in bouillon. 
Gelatin plate; colonies especially characteristic. ‘They start as round colonies, 
from which extend fine branches. These radiate widely and are atefirst fine 
and subsequently polypiform. Sometimes they are simply fine, radiating lines, 
not polypiform, and occasionally the colony is simply lobate, without radiating 
fibers. 
Gelatin stab, along the needle track are lateral extensions forming ¢hzz sheets, 
thus producing the form of an inverted fir tree. Surface growth thin and 
irregular, 
Agar, spreads rapidly from the needle track, with radiating fibers rather 
thick. 
Potato, dirty white, brown, rough, with a sandy appearance. 
Milk; no effect except a slight alkalinity. After three weeks it becomes 
slightly slimy. No effect on cream or butter made from the cream. Develops 
no aroma or taste. 
