130 Proceedings of the Royal Physical Society. 



in 1843, all tlie 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. S. 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 Plodden, 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, ISTorth 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 Eailway cut through a series of recent 

 deposits in the hollow between the ridge on which Morning- 



