162 TRANSACTIONS, NATURAL HISTORY SOCIETY OF GLASGOW. 
Mr. Matthew Ballantine exhibited by lime-light a fine series of 
micro-photographs of botanical slides, illustrating the tissues of 
Vascular Cryptogams, Gymnosperms, and Angiosperms. 
Rey. David Landsborough, Corresponding Member, showed a 
collection of twigs from trees and shrubs grown in Arran. 
Interesting details were submitted regarding the growth of each 
species. 
Mr. Landsborough also read a paper on the various species of 
Gum-Tree (Hucalyptus) best adapted to the West of Scotland. 
27TH Fepruary, 1894. 
Professor Thomas King, President, in the chair. 
Mr. L. Watt exhibited three forms of Potamogeton polygonifolius, 
Pour., from the Kilpatrick Hills, and specimens of Zannichellia 
palustris, Linn., from Dumbarton Common. He also showed 
several plants from the South of England, including Jnula 
Helenium, Linn., Chenopodium ficifolium, Sin., Eriophorum gracile, 
Koch, Spartina stricta, Roth, and S. Yownsendi, H. & J. 
Groves. 
Mr. Waitt also made some remarks on the various points of 
difference between Carex irrigua, Hoppe, and C. lumosa, Linn., 
and exhibited illustrative specimens of these two sedges. 
Mr. Robert Dunlop showed an interesting series of specimens, 
including a scorpion from Mount Lebanon; remains of a fresh- 
water crustacean (Apus glacialis) from Airdrie; and a fossil arctic 
willow, with other traces of plant life, from the boulder clay at 
Airdrie. 
Mr. W. A. Dobie exhibited a specimen of a sea-spider (Pynco- 
gonum littorale, O. F. Miill.), and made some remarks on the 
affinities, structure, and habits of the species. 
Mr. David Robertson, F.L.S., F.G.8., showed an unusually 
large specimen of Aglaophenia myriophyllum, Linn., from the 
Firth of Clyde, and submitted some notes descriptive of this 
hydrozoon, (See page 83.) 
Mr. Peter Ewing read a paper on Alchemilla vulgaris, Linn., 
and its allied forms, which he illustrated with a series of specimens. 
(See page 40.) , 
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