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Proceedings of the Royal Society of Edinburgh. [Sess. 
tions of Carex rostra ta and Phragmites communis in the bays, there is no 
great development of the littoral flora. Nearly everywhere the stony 
shore has a thin, narrow zone of Juncus articulatus, often mixed with 
Ranunculus Flammula at the margin of the water (fig. 51). Besides those 
already mentioned, the chief species of this loch are as follows : — Rittorella 
lacustris, Lobelia Dortmanna, Isoetes lacustris, Juncus fluitans, Potamogeton 
praelongus, P. polygonifolius, P. lucens, Nymphsea lutea, Castalia speciosa, 
Equisetum limosum, Iris Pseud-acorus, Mentha aquatica, Myosotis palustris, 
Polygonum Hydropiper, Veronica scutellata, Hydrocotyle vulgaris, etc. 
Meikle Dornell Loch is a small circular pool b mile west of the last 
mentioned, and connected with it by a burn. This little loch is sur- 
rounded by low hills, and the water is bordered by peaty banks, so that no 
shore intervenes between it and the moor. It is almost surrounded by a 
belt of Phragmites communis. There are also a few plants of Scirpus 
lacustris. A number of species common to the last-mentioned loch abound 
here also. 
Loch Glentoo is 4 miles west of Castle-Douglas. It lies in a hollow 
of the moor, and appears to have occupied a much larger area at one time, 
if one may judge by the extent of low, marshy ground around it. The 
margins of this loch are treeless and its water is rather peaty. From the 
north and west shores outwards it is half overgrown with great beds of 
Phragmites communis mixed with Scirpus lacustris, and about the shore 
Carex rostrata and C. filiformis abound (fig. 52). At the south-west end 
the growth of marsh vegetation is very dense, and merges gradually into 
moor through an area of bog. Occasionally the shore is stony, but more 
frequently only a peaty bank divides the water from the moor. The flora 
resembles that of the next loch. 
Loch Bargatton occupies an open position on the moor J mile 
south-west of the last mentioned. It is somewhat circular in outline, and 
the water is peaty. The eastern shore is stony and rocky, and compara- 
tively bare of plants. The western side is overgrown with dwarf Phragmites 
communis, which also occurs in bays at other parts of the loch. 
This loch and Loch Glentoo, although at an elevation of only about 200 
feet above sea level, resemble lochs of a highland type in their floras, because 
of their exposed position on the open moor and their peaty water. Shore 
rocks were sometimes freely coated with Grimmia apocarpa, Hypnum 
cupressiforme, Orthotrichum rupestre, etc., whilst common bog mosses, 
particularly various species of Sphagnum, were occasionally abundant. In 
tiny pools upon the shores grew Chiloscyphus polyanthos, var. rivularis, but 
otherwise Hepatics were scarce. The other plants more or less common to 
