118 Proceedings of the Royal Society of Edinburgh. [Sess. 
less scattered ; they are as follows : — Littorella lacustris, Lobelia Dortmanna, 
Myriopliyllum alterniflorum, Juncus fluitans, Potamogeton lucens, P. natans, 
Glyceria fluitans, Heleocharis multicaulis, H. palustris, Equisetum limosum, 
Carex rostrata, C. Goodenovii, C. flacca, var. stictocarpa, C. flava, var. minor, 
Juncus effusus, J. conglomeratus, J. lamprocarpus, Ranunculus Flammula, 
Mentha sativa, Eriophorum polystacliion, and Hydrocotyle vulgaris. 
Lochenbreck Loch has a rhomboidal outline, each side being about 
J mile long. It is situated at an elevation 'of 651 feet above sea level, 
amongst the hills, about 7 miles N.N.E. from Gatehouse-of -Fleet, and 
has the characteristic features of a bare highland loch, modified by a 
plantation of coniferous trees on its eastern shore. The shores are 
stony, and the water, which has a maximum depth of 15 feet, is clear, but 
slightly peaty. The flora is of the ordinary type, excepting an abundance 
of Heleocharis multicaulis, some of which, growing in water 6 to 12 inches 
deep, had floating leaves. The western shore has a thin zone of Phragmites 
communis and associations of Carex rostrata, whilst the following grow 
not only there, but some of them at other parts of the loch as well : — 
Lobelia Dortmanna, Littorella lacustris, Isoetes lacustris, Juncus fluitans, 
Heleocharis palustris, Castalia speciosa, Juncus lamprocarpus, J. bufonius, 
Ranunculus Flammula, Juncus supinus (erect form 6 inches high), Caltha 
palustris, Sparganium natans, and Potamogeton polygonifolius. A number 
of common Bryophytes occur upon the shores, Sphagnum acutifolium 
being particularly abundant in some of the wet places. 
Woodhall Loch, or Loch Grenoch, is 2 miles N.E. of the last 
mentioned. It is nearly 2 miles long by \ mile broad, at an elevation of 
173 feet above sea level. Being somewhat wind-sheltered by low hills, 
and surrounded by meadow, grassy moor, or deciduous wood, it presents 
the general features of a lowland loch, saving that its water, which has a 
maximum depth of 49 feet, is slightly peaty. Here and there a gravelly 
bay occurs, but frequently the moor or meadow land abuts upon the water 
without the intervention of a shore. Where a strip of shore does occur, it 
is narrow, stony, and frequently covered with Juncus lamprocarpus and 
J. acutiflorus. Being provided with a wide but shallow outflow, and fed 
only by small streams, the level of this loch has but little rise and fall, 
because in wet weather the water readily escapes, and in a dry season the 
level is maintained by the shallow effluent. The west side has a reedy or 
sedgy margin, almost continuous throughout its length, but on the east 
side the reeds are mostly restricted to the bays. At either end there are 
large associations of Equisetum limosum, and at the north end the 
specimens of this plant are very large, rising 3 or 4 feet out of water 6 feet 
