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communis (fig. 44) in some of the bays, the littoral flora is very scanty. 
Potamogeton polygonifolius and Juncus fluitans were the only submerged 
Phanerogams occurring in abundance near the margin, but as there was no 
boat available, I am unable to state what the result of dredging might have 
been. The submersed rocks near the shores, as well as those exposed, 
frequently exhibited a wealth of Bryophytes : Scapania undulata, Nardia 
compressa, and N. emarginata were particularly luxuriant on many sub- 
mersed rocks, as well as upon those dripping with water from the cliffs 
above. By their charm of colour and exuberant growth, the following 
were very conspicuous at the western margin of the loch : — Breutelia 
arcuata, Trichostomum tortuosum, Bhacomitrium protensum, R. lanugi- 
nosum, Hyocomium flagellare, Anthelia julacea, and various species of 
Sphagnum, particularly S. cymbifolium. Lichens were also abundant on 
the exposed rocks, especially a species of Collema. In some places sub- 
mersed rocks were covered with a felty, mat-like growth of Algae, which, 
upon careful examination, proved to be a mixture of three Myxophyceae — 
Scytonema mirabile, Stigonema ocellatum, and Dichothrix Nordstedtii. 
Loch Minnoch is a mile N. of Loch Dungeon. It is only \ mile 
long, and is beautifully situated amidst rugged hills. The water is very 
clear, being, in fact, that of Loch Dungeon, which flows into it by the 
Hawse Burn. This burn, which enters the loch on its south side, has 
brought in a large amount of detrital matter, causing a shallow area and a 
considerable bog on that side of the loch (fig. 45). This shallow part is 
overgrown with Equisetum limosum, etc., whilst the bog, which is covered 
with appropriate vegetation, merges imperceptibly into moor. The west 
shore is peaty, and it, together with the south shore, forms a suitable habitat 
for a considerable number of plants, such as associations of Scirpus lacustris, 
Phragmites communis, Equisetum limosum, Carex rostrata, Heleocharis 
palustris, Eriophorum polystachion, E. vaginatum, as well as mixed groups 
of common but less dominant plants. The north and east shores are rocky 
and bear a very scanty vegetation. Rhacomitrium aciculare and Blindia 
acuta are abundant on submerged rocks; so also is an aquatic form of 
Catharinea undulata, which covers submerged rocks to a depth of a foot or 
more. Dicranella squarrosa, Hypnum vernicosum, H. scorpioides, and 
others are common on the shores. 
Loch Harrow is rather larger than the last mentioned, and about 
J mile north of it. The surface is 812 feet above sea level, and the 
maximum depth is 29 feet. The shores are more stony and there are fewer 
associations of littoral plants, otherwise it is similar to Loch Minnoch. 
The moor about the three last-mentioned lochs is mostly covered with 
