The Ancient Lakes of Edinburgh. 139 
pansions existed here also during some part of the glacial 
period. 
In conclusion we wish it to be distinctly understood, that 
from the furtive manner in which the material from these 
old lake deposits was collected, the number of Mollusca and 
Ostracoda given in our lists cannot be taken as exhaustive 
for all or any of the deposits, but tentative merely, and that 
new exposures of these or any other lake deposits in or 
around Edinburgh would likely yield more species than we 
have here recorded. In the division of labour connected 
with this paper, it should be stated that the material was 
collected by Mr J. Bennie, and the naming of the species 
and the identification of their characters was done entirely 
by Mr Scott. : 
Tuer “ Nor’ Loc.” 
We were able to procure from the old bed of this loch 
only a small quantity of material for examination, and in it 
organic remains, both animal and vegetable, were fairly 
abundant. Among the organic remains were several species 
of Ostracoda,—two of which, viz., Cypris prasina, Fischer, and 
Candona candida (Miiller), were moderately common,—and 
some imperfectly preserved molluscan shells. 
The following are the species of Ostracoda and Mollusca 
from this deposit identified by us. 
It may be stated that the site of the loch is about 21 miles 
from the sea, and about 150 feet above sea-level. | 
MOLLUSCA. 
Pisidium pusillum (Gmelin). One valve. 
Limnea peregra (Miller). A few imperfect specimens. 
OSTRACODA. 
Cypria ophthalmica (Jurine). Rather scarce. 
Cypris prasina, Fischer. Common. 
Lirpetocypris reptans (Baird). Rather scarce. 
Candona candida (Miller), 6 2- Both forms common. — 
‘ lactea, Baird. Frequent. 
LInmnicythere inopinata (Baird). Frequent. 
