q 
336 Part I11—Kighth Annual Report 
MOLLUSCA. 
Spherium corneum (Linné). Not common. 
Pisidium amnicum. Rare. 
fontinale (Draparnaud). Frequent. 
pusillum (Gmelin). Frequent. 
» nitidum (Jenyns). Common. 
Valvata piscinalis (Miller). Common. 
Planorbis albus, Miller. Rare. 
pt contortus (Linné). Common. 
Limnea peregra (Miiller). Not common. 
truncatula (Miller). Not Common. 
39 
99 
97 
CRUSTACEA. 
DAPHNIADA. 
Daphnia pulex, Very Common. | Ephippia also 
55. 0 Betula, Frequent. frequent. 
CopEPoDA. 
Diaptomus castor, Very common. 
Cyclops pulchellus, Common. 
»,  strenuus, Frequent. 
te: as Very common (several stages). 
OSTRACODA. 
Cypria ophthalmica (Jurine). Frequent. 
Cypria serena (Koch). Frequent. 
Cyclocypris globosa (G. O. Sars). Not very commen. 
Erpetocypris strigata (O. F. Miller). Not common. 
tumefacta, Brady and Robertson.’ Not common. 
Cypridopsis villosa (Jurine). Not very common. 
Candona candida (O. F. Miller). Frequent. 
» rostrata, Brady and Norman. Scarce. 
5,  kingslet1, Brady and Robertson. Scarce. 
Insect larvee, aquatic Coleoptera, Diatoms, and Confervee were also 
observed to be more or less common both in the loch and around its 
margins. 
2. THE CouLteR BuRN FROM THE LocH TO CRAIGQUARTER Woop. 
After the loch had been carefully examined we next proceeded to ex- 
amine this section of the Coulter Burn. Its course is over open moorland, 
and there are comparatively few places along its banks which form suitable 
habitats for aquatic organisms. No Mollusca* nor Crustacea were observed 
in this part of the burn, the only things noticed being insect larvee—chiefly 
of the Phryganeide—but in the few marshy places and pools along its 
sides several species of Entomostraca and one or two of Mollusca were 
obtained. The water of the burn was very pure. 
The following is a list of the Mollusca and Crustacea observed :— 
* Spheriwm corneum is, however, very abundant in the covered passages through ’ 
intel the burn runs from the sluice of Loch Coulter for several yards. 
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