206 ANNALS OF SCOTTISH NATURAL HISTORY 



eggs, 1 8th May. Seemed to be more at the great gullery at 

 Harelaw Dam (Renfrew) than formerly. Increasing in the 

 Outer Hebrides but great mortality in young, as on tenth day 

 after hatching only one in five were alive. 



L. CANUS (Common Gull). Pair returned to breeding-ground, 

 Swordale, on 3rd April. Two nests with two eggs each, Bute, 



1 3th May. The "most destructive and the blackest thief of 

 the genus," judged by its depredations among the eggs of 

 other species in the Outer Hebrides (p. 27). 



L. FUSCUS (Lesser Black-backed Gull). First pair for season in 

 Glasgow Harbour, 2oth March. First seen in Mull on 22nd 

 April, which is later than usual. Large colonies of this species 

 and the Herring Gull breeding on the Green Holm early in June 

 (p. 3). Seen until 2oth September, and a single bird loth 

 October, at the Fair Isle (p. 84). 



L. MARINUS (Great Black-backed Gull). Much scarcer than the 

 Lesser Black-backed Gull in the Shetlands (p. 3). A great 

 colony in the Outer Hebrides described, sixty-two old birds 

 being counted on one island and thirty-four young being killed 

 and four eggs taken (p. 28). 



L. GLAUCUS (Glaucous Gull). Seen on Fair Isle 28th October, and 

 remained off the island all winter (p. 84). 



L. LEUCOPTERUS (Iceland Gull). One at Skerryvore, 8th March. 

 One North Berwick, 3rd April. A young one at the Flannans 

 on 1 2th September. 



RISSA TRIDACTYLA (Kittiwake Gull). At Unst on gth June, great 

 numbers were flying down the Sound in one continuous 

 stream, while on iith at Barra Firth they were flying up 

 similarly, one hundred being counted in less than a minute 



(P- 5)- ' 



MEGALESTRIS CATARRHACTES (Great Skua). One seen about two 

 miles north of Lendalfoot (Ayr), by Mr. Charles Berry, on 



2 2nd October new to "Clyde." Forty-two nests on Hermaness 



(P- 4). 



STERCORARIUS CREPIDATUS (Arctic Skua). On 3oth August at St. 

 Andrews, 30-40. One seen diving on Isle of May (p. 22). 

 Several in the Firth of Forth, 8th October. 



ALCA TORDA (Razor-Bill). In great numbers at Sule Skerry on 



May. Bass Rock, young, 3oth June. A few young off Staffa, 

 only species off nest on iSth July. Seen frequently on the 

 Isle of May till 3rd October (p. 22). On 26th October a few 

 off Barra (p. 9). 



