370 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



a clutch of three eggs chipped for hatching*. It comes 

 to the neighbourhood of the Village aud assists the 

 Hooded Trows in acting the part of scavengers, but it is 

 less bold than th'e latter birds. 



Linux marinus (Great Black-backed (tuII). 



Resident and fairly plentiful, and would be much more 

 so than it is, wore not its eggs taken and its young 

 destroyed by the natives on every possible opportunity. 

 As in other places, it shows a special preference for nest- 

 ing on isolated stacks and narrow projecting headlands, 

 but I found one nest, identifying the bird perfectly, on 

 the hillside on Soay, near the "Altar," in such a situation 

 as Larus fuscus might choose. On June 6th I found on 

 the top of Soay Stack a single nest containing three young 

 just hatched; this stack had not been landed on previously 

 that year, so that the pair of birds had bred undisturbed. 

 On Tune 11th I found four pair of birds breeding on 

 Levenish. One of the nests contained two young birds, 

 four or five days old, and another three eggs just ready for 

 hatching. Two other nests contained two and three eggs 

 apiece, nearly fresh; these latter were doubtless second 

 layings, as the rock had been visited before by the natives, 

 on May 19th, and they would have taken every egg they 

 saw. This bird and L. argentatus are great robbers of 

 Fulmars' eggs, if these are left exposed by the parent bird 

 quitting the nest, and are disliked by the Datives 

 accordingly. 



Rissa tridactyla (Kittiwake). 



Very plentiful, breeding in numerous scattered colonies 

 round the coasts of all the islands, including Boreray, 

 especially on the south side of Dun, and on the west side 

 of the main island, and on the cliffs and stacks in the 

 neighbourhood of Soay Sound. Although there is no 



