282 
Part HI. — Ninth Annual Report 
CRUSTACEA. 
Amphipoda. 
Gammarus pulex (Liime). Frequent in and about the three lochs. 
COPEPODA. 
Din2Jtomus gracilis. Loch Baliiagowan. 
Cyclops tenuicornis. Loch Kilcheraii. 
,. serrulcdus. Frequent in the three lochs. 
crassicornis. Loclis Balnagowan and Kik^heran. 
Cantliocamptus minutus. Frequent in tlie three lochs. 
OSTRACODA. 
Cypria ophihahnica (Jurine). Frequent in the three loclis. 
screna (Kocli). Frequent with the last. 
Cyclocy2)ris glohosa (G. 0. Sars). Balnagowan and Kilciieran Lochs. 
Scottia hroicniana (Jones). Loch Kilcheran, not common. 
Cypris obliqua, Brady. Loch Balnagowan, frequent. 
J, incongruens (0. F. Miiller). Loch Balnagowan, rare. 
Erpetocypi'is reptans (Baird). In the three lochs. 
olivacea, Brady and Norman. Lochs Balnagowan and Kilcheran. 
robcrtsoni, Brady and Noiman. Kilcheran Loch, scarce. 
,, tumefacta (Brady and Robertson). Lochs Balnagowan and Kilcheran. 
Cypridopsis vidua (Miiller). In the three lochs. 
villosa (Jurine). Lochs Balnagowan and Kilcheran. 
Potamocypris fulva, Brady. In the three lochs, frequent. 
Notodromus monacha (Miiller). Loch Balnagowan, frequent. 
Candona Candida (Miiller). Frequent in the three lochs. 
„ lactea, Baird. Lochs Balnagowan and Kilchei-an. 
,, puhescens (Kodh). In the three lochs, not uncommon. 
kingsleii {V>vsi(\y and Robertson). Distribution as the last. 
Ilyocypris gibba (Ramdohr). Loclis Balnagowan and Kilcheran, 
Darivinella Steve iisoni, Brady an l Ro'^ertson. Loch Kilcheran, rare. 
Limnicy there inopinata {B'divd). In the three lochs, frequent. 
Cladocera. 
Simocephalus mtulus (Miiller). Loch Kilcheran. 
Ceriodo.phnia punctata (P. E. Miiller). Loch Balnagowan, not common, 
Bosmina longirostris (Miiller). Loch Balna-ovvan. 
,, longispina, Ley dig. With the last. 
Lynceus quadrangidaris (Miiller). Lochs Baliiagowan and Kilcheran. 
Chydorus globosus, Baird. Loch Balnagowan, not common. 
,, sphcericus {MiiWer). In the three lochs. 
As already stated, Infiiscria and also Diatomacea were present in 
Loch Balnagowan in considerable abundance. The more conspicuous 
of the Infusoria have already been referred to ; the more common of the 
Diatomacea wkitg Asterionellaformosa, with its star-like arrangement of tiie 
frustules, Pediastruni selencea, various species of Navicula, &c. Desmids 
were also of frequent occurrence. 
5. Loch Strathbeg. 
This loch, which is situated one and a half miles west from Rattray 
Head, Aberdeenshire, is about two miles in length by about three-quarters 
of a mile broad. It is separated from the sea by a ridge of bent-covered 
sandhills, nearly a mile in width. In the Old Stat stical Account of 
Scotland (1793), it is said "there is a tradition that in the beginning of 
