282 Part LIL—Ninth Annual Report 
CRUSTACEA. 
AMPHIPODA. 
Gammarus pulex (Linné). Frequent in and about the three lochs. 
CoPEPODA. 
Diaptomus gracilis. Loch Balnagowan. 
Cyclops tenuicornis. Loch Kilcheran. 
serrulatus. Frequent in the three lochs. 
» erassicornis. Lochs Balnagowan and Kilcheran. 
Canthocamptus minutus. Frequent in the three lochs. 
3° 
OSTRACODA. 
Cypria ophthalnvica (Jurine). Frequent in the three lochs. 
,, serena (Koch). Frequent with the last. 
Cyclocypris globosa (G. O. Sars). Balnagowan and Kilcheran Lochs. 
Scottia browniana (Jones). Loch Kilcheran, not common. 
Cypris obliqua, Brady. Loch Balnagowan, frequent. 
5, tncongruens (O. F. Miller). Loch Balnagowan, rare. 
Erpetocypris reptans (Baird). In the three lochs. 
olivacea, Brady and Norman. Lochs Balnagowan and Kilcheran. 
robertsoni, Brady and Norman. Kilcheran Loch, scarce. 
ne tumefacta (Brady and Robertson). Lochs Balnagowan and .Kilcheran. 
Cypridopsis vidua (Miller). In the three lochs. 
a villosa (Jurine). Lochs Balnagowan and Kilcheran. 
Potamocypris fulva, Brady. In the three lochs, frequent. 
Notodromus monacha (Miiller). Loch Balnagowan, frequent. 
Candona candida (Miller). Frequent in the three lochs. 
lactea, Baird. Lochs Balnagowan and Kilcheran. 
pubescens (Koch). In the three lochs, not uncommon. 
»,  ingsleii (Brady and Robertson). Distribution as the last. 
Ilyocypris gibba (Ramdohr). Lochs Balnagowan and Kilcheran. 
Darwinella stevensont, Brady and Robertson. Loch Kilcheran, rare. 
Limnicythere inopinata (Baird). In the three lochs, frequent. 
2) 
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99 
9? 
CLADOCERA. 
Simocephalus vetulus (Miller). Loch Kilcheran. 
Ceriodaphnia punctata (P. E. Miller). Loch Balnagowan, not common. 
Bosmina longirostris (Miller). Loch Balnagowan. 
,,  longispina, Leydig. With the last. 
Lynceus quadrangvlaris (Miller). Lochs Balnagowan and Kilcheran. 
Chydorus globosus, Baird. Loch Balnagowan, not common. 
»,  sphericus (Miiller). In the three lochs. 
As already stated, Infuscria 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 were A sterionella formosa, with its star-like arrangement of the 
frustules, Pediastrum selencea, various species of Navicula, &c. Desmids 
were also of frequent occurrence. 
5. LocuH 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 Statistical Account. of | 
Scotland (1793), it is said “there is a tradition that in the beginning of 
