224 
Ward . — -Thames Bacteria , III. 
Plates. Mycelium-like very thin, circular, radiating colonies, with 
very transparent wedge- or chisel-shaped fimbriae at margins, and 
liquefying in centre. Two days’ growth at 15 0 shows a dark eye and 
faint zone. All liquefied in seventy-two hours. 
Streak. Rapidly scoops and liquefies at 15 0 C., and forms a very 
white turbid mass. All liquid in ten days, with white turbidity and 
deposit. 
Stab. At 1 5 0 yellow-white dots in tunnel. Rapidly spreads above 
as a yellow T -white, radiating mycelium-like layer with an eye. In five 
days an eighth of the gelatine is liquefied, turbid. In three weeks half 
is liquid, very turbid, W’hite deposit. In a year a red-brown liquid and 
dirty deposit. 
Agar. In twenty-four hours at 20°, yellowish-white, wet, thin, 
confined to the streak, and even in seventeen days there is only the 
thin yellow-white streak. 
Potato. In three days at 20°, wet, yellowish-grey, spreading. In 
six days spread all over and very wet. In seven days very like form v 
but rather yellower. 
Broth. Turbid in twenty hours at 20°, very turbid in forty-four 
hours, and more so in sixty-eight hours. On the fourth day a white 
deposit, and still very turbid in a week : no veil, but deposit very 
white on eleventh day. 
All the characters seem to point to this being a weakened form of 
Proteus. 
Group VII. 
Colonies 7, 17, 23, 31, ( 5 ), K, and B. arbor escens. 
The Yellow Proteus Type. 
Among the commonest Bacilli, or at any rate rod-like 
Schizomycetes, to be found in the Thames at all seasons, are 
a series of forms of which the following are representatives 
isolated and cultivated by me. 
While their differences in detail are not to be overlooked, 
they present a number of peculiar characters in common so 
strongly marked that there can be little doubt they must 
