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PROCEEDINGS OF THE SOCIETY. 287 
WINTER SESSION, 1894-95, 
257TH SEPTEMBER, 1894. 
Professor Thomas King, President, in the chair. 
Mr. R. D, Wilkie reported on a recent excursion made to the 
Ardeer Sandhills (see page 274), and the Chairman on one to 
Mains, Milngavie. 
Mr. A. Somerville, B.Sc., F.L.S., exhibited fronds of Cystopteris 
- montana, Bernhardi, the Mountain Bladder Fern, gathered by 
him in August (1894) near the summit of Ben Lomond. This 
has hitherto been an unrecorded species for Stirlingshire, and its 
present discovery makes that county the sixth in Britain claiming 
to possess it. (See page 215.) 
Mr, Somerville also showed Hrebia blandina, Fab., the Scotch 
Argus Butterfly, from Glen Iorsa, Island of Arran, where he had 
met with it last month in abundance. 
Mr. Joseph Sommerville exhibited specimens of the wood of 
Pinus Lambertiana, Douglas, and Dimorphandra Mara, Benth. 
and Hook., the former being a Californian tree, and the latter 
a native of New Zealand, and he referred to their respective 
peculiarities. 
On behalf of Rev. Dr. Keith, Forres, Corresponding Member, 
there was shown a leaf-fungus, Puccinia ribis, DC., new to 
Britain, which he had met with in August in his own district. 
Professor King laid on the table a series of plants gathered at 
the excursions of the Scottish Cryptogamic Society at Stranraer 
last week. 
Mr. R. D. Wilkie exhibited, under the microscope, Beggiatoa 
alba, Trev., the sewage fungus of engineers, and referred to its 
action in decomposing sulphur compounds in the water in which 
it lives. 
Mr. Peter Ewing submitted a large series of flowering plants 
collected during the past summer in Kent, among them being 
Lyciwm barbarum, L., Marrubium vulgare, L., and Aristolochia 
Clematitis, L. 
Mr. James Whitton showed a specimen of Rhus cotinus, L., 
and pointed out its peculiarity of having always a number of its 
