THE FRESH- WATER LOCHS OF SCOTLAND. 
145 
Loch Moraig. — Entomostraca were here scarce, and Protozoa and 
Algse abundant. The commonest organism was a form of Ceratium 
hirundindla^ which was so abundant as to constitute a Wasserblut.” 
Loch Broom. — This shallow, marshy pool, with M enyanthes growing 
almost everywhere, yet had a quite ordinary lacustrine fauna, including 
Diaptomus (dark brown), Daphnia lacustris (very large), Cyclops 
strenuus (large hyaline), Bythotrejjhes. Gonochilus was much the 
commonest animal. An unusual form of Ceratium hirundinella, 
having both the median spines long, occurred. 
Loch Ordie. — The most abundant animals at the time this loch was 
visited v^eveHolopedium, (parrot-shaped head), Diaptomus 
(hyaline). Bosmina of two forms was found— ohtusirostris (small) 
and B. longispina. 
Loch nan Bun. — The highest loch in the Tay system visited. The 
predominant animal was Diaptomus gracilis (blood-red) ; Daphnia 
lacustris (very large), Bosmina ohtusirostris, and several species of 
Desmids, notably Staurastrum arctiscon, were present in some numbers. 
There was a scarcity of smaller organisms. 
Loch Shechernich. — The water was turbid from the abundance of 
life. The most conspicuous examples were Diaptomus (dark red, red 
and yellow, red and blue, or all blue), probably D. Wierzejshii, 
DaphniO' (parrot-shaped head), Bosmina (very large, purple), N otholca 
longispina, and Folyarthra. Asterionella was of a smaller size than 
usual. Numbers of a small yellow water-mite were seen. 
Loch Auchenchapel . — Ceratium hirundinella formed a Wasser- 
blut ’’ in the loch at the time it was visited. Other common animals 
were Bosmina ohtusirostris, Daphnia lacustris (small), Diaptomus 
(reddish), Conochilus. 
Tjoclh of lAntratlien. — The water was very clear, and organisms 
sparingly distributed. Daphnia lacustris (large) and Diaptomus 
yracilis (hyaline) were the only animals at all common. 
Loch Benachcdly . — LLolopedium was common on the surface, but not 
below. Diaptomus gracilis (brown, mostly immature) and Daphnia 
lacustris (large) were most abundant. Bosmina was scarce. 
Tjong Loch. — ^Very few animals were present, the commonest being 
Daphnia lacustris, Diaptomus gracilis (hyaline), and Conochilus. 
Fitlyal Loch . — This differed from most lochs visited about the same 
time in the general scarcity of life, especially of Entomostraca. It was 
one of the few lochs in the system where Bosmina cornuta took the place 
of the common B. ohtusirostris . There was a Wasserblut ’’ of a pale 
filamentous Alga. Volvo v and several other Algae occurred. Although 
in those various respects the biology approached the pond type, 
Leptodora was rather numerous. 
Forfar IjocIi . — The water was very turbid throughout, yet the fauna 
was mainly lacustrine, the commonest animal being Cyclops strenuus. 
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