The Ancient Lakes of Edinburgh. 143 
MOLLUSCA. 
Limnea peregra (Miller). Frequent, but many of them 
fragmentary. 
Planorbis glaber, Jeffreys. Scarce. 
Valvata piscinalis (Miller). 
Pisidium pusillum (Gmelin). Frequent often perfect. 
Jontinale. 
> 
OSTRACODA. 
Cypria levis (O. F. Miiller). Rather scarce. 
» serena (Koch). Rather scarce. 
Cypris incongruens, Ramdohr, Rare. 
Lirpetocypris reptans (Baird). Frequent. 
Cypridopsis villosa (Jurine). Common. 
Potamocypris fuloa, Brady. Frequent. 
Candona candida (Miiller), Very common. 
lactea, Baird. Rather rare. 
s pubescens (Koch). Rare. 
Liyocypris gibba (Ramdohr). Common. 
Limnicythere sancti - patricit, Brady and Robertson. 
Frequent, 
Cytheridea lacustris (G. O. Sars). Common. 
3) 
CORSTORPHINE LAKE NEAR STATION. 
This deposit is about 200 feet above sea-level, and 4 miles 
from the sea; in it Molluscan remains were abundant and 
in good preservation. Ostracod shells were also numerous. 
The following are the species of Mollusca and Ostracoda 
identified by us :— 
MOLLUSCA. 
Pisidium fontinale (Draparnaud). F requent, 
3 ntidum, Jenyns. Frequent. 
Planorbis glaber, Jeffreys. Rather common. 
. nautileus (Linné). Rare. 
Limnea peregra (Linné). Very common. 
truncatula (Miller), Not common. 
2) 
