PROCEEDINGS OF SOCIETIES. 165 
but the heterocysts at the base of the filaments were larger here 
than in that form. 
Mr. Vickers exhibited a series of slides from the Bath Micro- 
scopical Club of zoophytes, beautifully mounted, with the tentacles 
fully displayed. He also showed Polycystina as opaque objects, 
and rendered beautifully white by having been previously heated 
to redness. He announced that he had received some also in an 
unprepared state, and would readily exchange with members of 
the club for other materials or preparations. 
Mr. Crowe showed fine and lively specimens of Stephanosphera 
pluvialis and of Goniwm pectorale. These had been obtained by 
moistening some of the mud from the Bray-head locality, which, 
when taken, had become quite desiccated by the recent dry wea- 
ther, and which, thus treated and placed near the light, had de- 
veloped a population of these beautiful organisms almost as rich 
as in summer. 
Mr. Crowe likewise showed a minute infusorium, enclosed 
within a hyaline rigid cyst, in active writhing movement. The 
animal had a wreath of cilia at one extremity, and was doubtless 
a Vorticella or some related animal, just awaking from its encysted 
condition. 
Dr. Foot exhibited what appeared to be specimens of a Buac- 
terima in great multitudes and of exceeding minuteness, disco- 
vered by him in the urine of a patient. These moved vigorously 
about in the manner of these organisms, with a wriggling move- 
ment, sometimes executing a summersault in their progress. 
Dr. Foot had noticed these organisms so very shortly after he had 
obtained the fresh urine that he believed they certainly existed 
therein before emission. He considered that they exhibited a 
moniliform appearance, and that they showed an undulatory 
movement, and might thus appertain to Vibrio. 
Mr. Archer mentioned that he had not been able to see the 
latter character in Dr. Foot’s specimens, but it is possible that two 
forms existed in the material. To him they seemed very like Bac- 
teriwm termo (Duj.). Cohn has a genus Zoogloea, consisting of 
a gelatinous mass, pretty coherent, and of a somewhat white colour, 
having imbedded in it bodies scarcely, if at all, distinguishable from 
Bacterium, and which, when separated from the mucous mass, 
wriggle away in the water in the characteristic manner. Some 
of this production Mr. Archer had shown at the July meeting. 
Cohn then regarded Bacterium termo (Duj.) as but gonidia, as it 
were, of his Zooglea termo. Dr. Foot’s example showed no mucous 
matrix, therefore Cohn’s conclusions did not seem quite justified. 
Mr. Archer would regard the whole of the Vibriones as plants, and, 
indeed, as oscillatariaceous algee—structure, colour, and even the 
movement, seeming to him to establish that view. He conceived 
that, like Oscillatoriaceee in general, they grew enveloped by a 
tube; this tube he felt satisfied he had seen in a Vibrio. He 
conceived also that he perceived the bluish-green tint of “ phyco- 
chrome’”’ in their substance ; and as to their movement, it seemed 
