2 I 8 
Ward . — Thames Bacteria , III. 
the reaction being distinctly acid. In eleven days solution 
was rapid, and a chalky-white deposit had fallen. 
Glucose solution . At 25 0 C. an infection from agar gave 
no results, except very minute floating flecks and deposit 
in eleven days, the liquid remaining otherwise quite clear. 
No. 9 seems to be pathogenic to guinea-pigs according 
to Dr. Kanthack’s report. 
Attempts to revive No. 9 after a year failed. 
Since this form presents several differences from the 
typical form, and suggests alliances with Groups VII and XIV, 
I set forth its characters in tabular form. 
Number 9 ( Proteus type), Figs. 24 and 25. 
Habitat. The Thames. 
Sizes, & c. Short rodlets 1-5-2x0-75 to 1/1 and hardly if at all 
motile. No spores observed. 
Plates. At 12-15° yellowish-grey circular discs, edges irregular or 
fimbriated. Liquefaction rapid on the fourth day, the colonies floating 
and retaining their shape. Under | each colony zoned, brownish, 
with tresses at edges. 
Stab. At 1 2-1 5 0 rapid thistle-head funnel, and liquefaction, and 
repeated tough white veils form and fall. All liquid in three weeks or 
so, and a white ring and veil above, turbid liquid and slimy deposit of 
successively precipitated veils. 
Agar . At 22 0 and at 35 0 : rapid growth as a very white layer 
of confluent granulated or circular colonies becomes markedly white 
and shining. 
Potato. At 22 0 a peculiarly chalky- or milk-white granulated or 
mamillated spreading layer in forty-eight hours onwards. Becomes 
dull, and with slight metallic iridescence later. 
Broth. At 35 0 rapidly and densely turbid in twenty-four hours, 
and in 2-3 days an abundant white deposit, and trace of white ring. 
At 2 5 0 the same, but more definite veils form and fall successively. 
Even after a fortnight the turbidity persists. The deposit is very 
dense and white. 
Milk. At 2 5 0 separates in forty-eight hours, and in six days was 
rapidly dissolving the coagulum. Reaction distinctly acid. Chalky- 
white deposit in eleven days as solution proceeds rapidly. 
