Ward . — Thames Bacteria , ///. 
203 
irregular and granular. No liquefaction, but in sixteen days the 
colonies are sunk in the gelatine, and open out with radial striations 
from the darker central mass, in some cases the radii appearing 
fimbriated (Fig. 9). 
Streak. Begins to appear in twenty-four hours at 15 0 , and in 
forty-eight hours is very thin, white, slightly lumpy and dull. In 
seven days slowly sinking as a dull opaque white mass. 
Stab at 1 5-1 8° C. Begins by forming a delicate arachnoid film on 
the surface, and very slender outgrowths like root-hairs with tufts and 
granules along the axis. In a week or two there is a striated mem- 
brane above (Fig. 10). In a month one-eighth of the gelatine is 
liquefied — not reaching the bottom of the tunnel— the liquid faintly 
turbid. A very copious white deposit on the flat base. The tunnel 
shows very faint root-hairs here and there. 
In a year there is a clear yellow liquid, and cloudy white (yellowish) 
deposit. 
Agar. Growth apparent in fifteen hours, but slow, as 2-4 days 
show. In a month a thin, glistening, slightly spread yellowish-white 
layer, with somewhat fimbriated margins. 
Potato. Doubtful in three days, or else forms a thin film, the 
colour of the potato and almost invisible except as a wet patch. All 
grey. Same in a week. 
Broth. Turbidity just perceptible in eighteen hours, but only slight 
on the fifth day ; seventh day hardly turbid, but with a white deposit. 
Other cultures gave slight turbidity in forty-four hours, and in four 
days a considerable flocculent deposit, and nearly clear liquor : by the 
eleventh day the deposit was a little yellower. 
When again brought into continued culture, in 1895, No. 34 
gave the following characters, and clearly showed its nature 
as a feebly liquefying member of the Proteus type, allied to 
Nos. 51 and 103 respectively — in fact, midway between 
them. 
It occurs as rods up to 10 n long, breaking up to rodlets 
1*5-3 ju, X about 1 /q or in couples or fours. In water it is 
more than 1 fx thick, and the rods about 2-3 / u long, and 
motile. The ends are apt to stain more deeply. Old broth- 
cultures give rods up to 10-12//, and longer, and about 1 // 
