110 Proceedings of the Royal Society of Edinburgh. [Sess. 



are features of other parts. Submersed rocks are frequently covered with 

 such Algae as Batrachospermum vagum, Ulothrix, Zygogonium, etc. Figs. 

 7 and 10 illustrate this loch and its surroundings. 



Loch Narroch is quite a small circular sheet of water at the east end of 

 Loch Valley. In general features it closely resembles the neighbouring 

 lochs. The rocks of the margin were covered with remarkable quantities 

 of Algse, chiefly of the genera Batrachospermum, Ulothrix, Zygogonium, 

 Zygnema, and Mougeotia. 



Round Loch and Long Loch of Glenhead are both to the south of 

 Loch Valley ; they are, however, at a lower elevation and smaller. These 

 lochs are very bare of plants, and are otherwise similar to those recently 

 described. They are not of sufficient botanical interest, so far as I could 

 glean without a boat, to merit further discussion. Fig. 11 illustrates these 

 lochs, and the treeless, wild mountains around them. 



Loch Dee, which is 1| miles long by f mile wide, and 36 feet deep, 

 is the largest of this series of lochs. The outline is irregular, a peninsula 

 from the south shore and another froin the north jutting out so as almost 

 to divide the loch. It is situated at an elevation of 739 feet above sea 

 level, amidst wild and lonely scenery, about 5 miles south of Loch Enoch. 

 Although at a lower elevation, it is similar in general features to that and 

 the neighbouring lochs, excepting that the sand of its shores is not white 

 but of a brownish tinge ; the water also differs in being somewhat more 

 peaty. Away from the sandy bays the shores are mostly rocky. The flora 

 is extremely poor, and being composed of the same species as occur in the 

 previously mentioned lochs, need not be specially described. A boat which 

 is kept here was out of repair during my visit, but careful attention to 

 plants washed up on the shore revealed nothing uncommon to the district. 

 Bryophytes abound on the shores and on the exposed rocks. Very con- 

 spicuous also are the lichens which cover the numerous rocks by the shore ; 

 the most plentiful of these are — Platysma glaucum, Cetraria muricata, 

 Parmelia lanata, P. omphalodes, Alectoria jubata, Sphaerophoron coralloides, 

 and Lecanora tartarea. Fig. 12 afl'ords a view of the loch, chiefly its 

 S.W. portion. 



Dry Loch, Round Loch, and Long Loch of the Dungeon.— These are 

 small sheets of water, each a few hundreds of yards long, and they are all 

 connected by a stream which first flows out of the Dry Loch, that being 

 the highest of the three; this stream ultimately becomes the River Dee. 

 Their shores are stony or peaty, and their water is slightly peaty but clear. 

 These lochs are situated at the highest and wildest part of the glen (p. lOfi), 

 between Dungeon Hill and Craignaw, and the scenery around is extremely 



