288 
Part III. — Ninth Annual Report 
MOLLUSCA. 
Mya arenaria, Linne. Loch Stenness, abundant. 
Pisidium roscum, Scholtz. Head of Loch Harray. 
Planorbis nautileus (Linne). Head of Loch Harray. 
Valvata cristata, Miiller. Head of Loch Harray. 
Neritina flttviatilis (Linne). Loch Harray at Bridge of Brogar, common. 
Hydrohia ulvce, Pennant. Loch Stenness, common. 
CRUSTACEA. 
COPEPODA. 
Dias longiremus, Lillj. Common in Loch Stenness. 
Diaptomus gracilis, G. 0, Sars. Loch Harray, fiequent. 
Cyclops viridis, Jurine. Frequent in Loch Harray. 
,, oequorus, Fischer. Frequent in Locli Stenness. 
OSTEACODA. 
Cypria screna (Koch). Loch Harray, generally distributed. 
'„ Icevis (0. F. Miiller). Loch Harray, not so common as the last. 
,, ophthalmica (Jurine). Loch Harray, frequent. 
Cypris prasina, Fischer. Loch Harray, near Bridge of Brogar. 
Erpetocyjjris rcptans (Baird). Loch Harray, upper end. 
Cypridopsis villosa (Jurine). Loch Harray, generally distributed. 
Potamocypris fulva, Brady. Loch Harray, lower end. 
Candona Candida (Miiller). Loch Harray, generally distributed. 
Caiidoiia lactca, Baird. Loch Harray, u})per end. 
,, puhesccns (Koch). Loch Harray, generally distributed. 
hyalina, B. and R. Loch Harray, rare, but generally distributed. 
,, kingsleii, B. and R. Loch Harray, rare, upper end. 
Ilyocypris gihba (Ramdohr). Loch Harray, frequent, generally distributed. 
Limnicythere inojnnata (Baird). Loch Harray, generally distributed, but not 
very common. 
Cytheridea torosa (Jones). Loch Stenness, common ; Loch Harray, lower end. 
Cythere pcllucida, Baird. Loch Stenness, frequent. 
,, confusa, B. and N. Loch Stenness, frequent. 
,, gibbosa, Brady and Robertson. Loch Stenness, rare. 
Cytherura nigrescens (Baird). Loch Stenness, frequent. 
gibba (Miiller). Loch Stenness, rare, 
Cladocera. 
Daphnia pulex. Loch Harray, very abundant. 
PROTOZOA. 
FORAMINIPERA. 
Miliolina agglutinans. Loch Stenness, not common. 
suh'otunda. Loch Stenness, not common. 
Truncatulina lobatula. Loch Stenness, not common. 
Polystomella umbilicatula. Loch Stenness, not common. 
Nmiionina depi-essula. Loch Stenness, not common. 
