Ward. — Thames Bacteria , III \ 
223 
Plates. Crenate circular colonies, orange-yellow and sinking. 
Nothing visible even under J till ninety hours, and very slow at 115 
hours. In 140 hours small colonies, yellowish and granular, are 
visible, the largest being mm. In seven days the largest is 1 mm. 
finely granular greyish* yellow circles. Slowly liquefy. 
Streak. Soon sinks and forms a yellow eye. Liquefies slowly: 
pale and dull yellow. 
Stab. Rapid dots in tunnel in forty-eight hours. In three days a 
slight depression (thistle-head) with a dark eye and cloudy liquid: deposit 
yellowish and dense. In fourteen days one-eighth gelatine liquefied, 
and a funnel forms with rusty yellow-white deposit, and dots in tunnel. 
Resembles £ but is more orange. In a month one-fourth liquefied, but 
not to the bottom of the funnel ; very turbid, a yellow clot rests on the 
solid base. In a year the liquid is brownish with a slight dirty-white 
deposit. 
Agar. White layer in twenty-four hours. Yellowish-white broad 
wet streak in five days. Cloudy-white and slightly mesenteric. 
Grows in fifteen hours. In two days a thick, wet, white mesentery, 
and in four days copious yellowish-white wet mesentery. In fourteen 
somewhat buff, thick and wet. 
In a month it is white with a buff tinge 1 , thick, wet, not much 
spread, and forms a somewhat buff deposit in the drainage. 
Potato. Nothing, or an invisible film in three days at 20° C. ; a thin 
slightly buff streak in six days. Nothing in three weeks at 15 0 C. 
Broth . Traces first visible on the third day; on the fifth slightly 
turbid with traces of white deposit. Same seventh day. More on tenth. 
In a month densely turbid, and yellowish-white deposit : no veil. 
Milk. Very faintly alkaline in twenty days, but no visible change 
in a month. 
In a year a brown liquid with white clots, like cream clots. 
Glucose. Doubtful traces of deposit. 
This form seems, in some respects, to connect this typical Proteus 
group with the yellow species considered under the next type. 
Colony e, Fig. 35. 
Habitat. The Thames. 
Morph. Very small rodlets i x 0-5 /*, or nearly cocci on old 
gelatine. 
1 Yellower than $. 
Q 3 
