130 Proceedings of the Royal Physical Society. 
in 1848, all the deposits laid down by the waters of the loch 
would be thoroughly exposed; but we have not seen any 
notices of the exposures at that time. 
Bristo Port LAKE. 
In a cutting for a sewer at Bristo Place in 1872, a deposit 
of black mud was exposed, portions of which were secured and 
washed. A few seeds were found in it, and a good number 
of oblong bodies somewhat boat-like in shape, yellowish- 
brown in colour, with two black spots or dots near the middle. 
These bodies have been determined by Dr Woodward and 
Professor G. 8. Brady to be the epiphia or winter eggs of 
Daphnia, and being such, they prove that a small lake or 
water pool existed in the grounds just outside of Bristo Port. 
At that time Edinburgh was a walled city, probably about 
the time of Flodden, say in the fifteenth century. No 
Mollusca or Ostracoda were found with them, but they of 
themselves are sufficient to prove lake-like conditions. 
LAKE, NORTH SIDE OF BLACKFORD HILL. 
The material from this place was sent as a curiosity to 
Professor A. Geikie in 1872 by a builder who had made 
some drains in the hollow on the north side of Blackford Hill. 
No particulars were given of the circumstances of the deposit, 
but it is evident, from the character of the material itself, 
a perfectly pure marl, that it had been deposited from the 
waters of a small lake formed by, and probably drained by, 
the Pow Burn, which flows through the hollow. It was 
probably of long standing, as the marl was quite free from 
any clay or earth, or vegetable matter, in the shape of peat, 
or stems or roots of water plants; the only vegetable 
remains in it being seeds of Chara, which are very numerous, 
and in good preservation. 
JORDANVALE LAKE 
The Suburban Railway cut through a series of recent 
deposits in the hollew between the ridge on which Morning- 
