202 
Ward . — Thames Bacteria , III. 
lates. In a week this is fairly abundant and the liquid clears. 
At 25° the course of events is the same, but with more vigour 
and rapidity. An abundant white deposit, easily shaken up 
into the clear supernatant broth, which undergoes no change 
in colour. Even in 3-4 weeks there is no trace of ring 
or veil. 
Milk. At 35 0 shows no change in a week, but in 2-3 weeks 
it is quietly peptonizing without any coagulation. At 25 0 no 
change in a week, but in three weeks shows signs of pepton- 
izing without coagulum. The peptonization is very slow and 
in some cases does not begin — so far as the clearing of the 
milk shows — until the third week. 
There can be little doubt that No. 103 is the form called 
Proteus mirabilis by Hauser 1 and Bacillus mirabilis by 
Zimmermann 2 , and which has been found in water by a 
number of observers. 
Tataroff 3 met with a variety which formed a dirty yellow 
colouring, but regards it as identical. 
No. 34 : Type of Proteus (Hauser). 
This form has an interesting history. It was isolated in 
March, 1894, and kept in culture throughout 1895. 
It showed at first no signs of liquefaction, but during culture 
a tendency to sink into, and slightly liquefy was manifested, 
and alterations of various kinds made themselves apparent in 
the characters of the colonies. The principal features when 
first isolated were as follows : — 
Habitat. Thames, in March, 1894. 
Morph . In gelatine it forms short active rodlets 3x14. 
Plates. Nothing visible even under the -J in forty hours, but visible 
to the unaided eye in ninety hours as thin, irregular, film-like plates 
with a bluish sheen when held up, contoured fimbriated edges, and 
a darker central spot (Fig. 8). The submerged colonies are yellowish, 
1 Hauser, 1. c. 2 Zimmermann, 1. c. p. 68. 
3 Tataroff, 1. c. p. 19. 
