Ward . — Thames Bacteria , ///. 219 
Glucose. Merest traces of flecks and deposit in eleven days at 
2 5 0 C. The liquid remained clear. 
I am strongly inclined to the belief that No. 9 is a variety 
connecting the B. Ter mo type with the Proteus type, and if 
so it bears out a widespread suspicion among bacteriologists. 
The same applies to the following forms, the tabular summaries 
of which give the principal characters. Several of them 
appear to me to be weakened forms, but some had not 
been sufficiently studied before passing out of cultivation. 
Number 9 a ( Variety of Proteus type), Fig. 26. 
Habitat . The Thames. 
Morph. In six weeks, gelatine, practically cocci 1 /x in diameter, or 
short rodlets 1 x 1*5 /x fresh. 
Plates . Nothing in forty hours even under J, but quite visible to 
the unaided eye in ninety hours, and slowly liquefying in 115 hours. 
By the sixth day the colonies float in a yellowish watery liquor, as 
balls of a grey-white colour and 1-2 mm. diameter. 
Streak. In twenty-four hours at 15 0 an extremely thin white streak, 
and in forty-eight hours this is nearly flush with the gelatine-surface, 
very thin, matt, white. In seven days much slower and thinner than 
form A, but similarly white, flush and granulated. Rapid liquefaction 
in eleven days. 
Stab. In a month the gelatine is half liquefied, with a very turbid 
liquor over a white deposit on the floor. Grows in acid gelatine. 
After some months a viscous clear yellow liquid and yellow-white very 
flaky deposit. 
Agar. In five days at 20° a very thin dull white layer confined to 
the streak. In a week, a mere extremely thin film where the loop 
touched the agar. 
Potato. In five days at 20° a very thin, wet, creamy- white film. In 
eight days extensive, thin, with matt edge, yellowish with metallic 
irridescence on the surface in the middle. 
Broth. Faintest turbidity in eighteen hours, but white turbid in 
forty hours and with slight deposit. Very turbid in three days and 
with white deposit, but on the fifth day clearer above and only slightly 
