The Zoologist — July, 1866. 807 



Common Gull. — To be met with all the year round ; in great 

 numbers in winter. Adults in summer dress are rare in spring and 

 summer, and ev^en the young are scarce in the early part of summer. 



Herring Gull. — Resident; very common during winter from Sep- 

 tember till April. They are not so plentiful in summer. 



Lesser Blackbacked Gull. — The summer gull of this county. 

 Arrives stragglingly in March ; is very abundant from April, grows 

 scarce from October, and is rare in winter. Breeds. 



Great Blackbacked Gull. — Resident; more abundant in spring; iu 

 stormy weather, in winter, many are driven into the Bay. 



Iceland Gull. — Stragglers to be seen every winter, chiefly in the 

 cream-colour dress. 



Glaucous Gull. — Same remarks, but rarer than the last. 



Skua. — Not uncommon in autumn. None of the skuas are to be 

 seen in spring, 



Pomerine Skua. — Some autumns the commonest of its family : to 

 be met with every autumn. 



Richardson's Skua and Longtailed or Buffon's Skua. — Common in 

 autumn. 



Fulmar Petrel. — I only know of it occurring once, and that an 

 adult, on the north strand. 



Great Shearwater. — Occasional in spring and autumn. 



Shearwater. — One of the commonest birds of the Dublin waters in 

 April and May, to be met again in autumn in numbers. Stragglers 

 during winter. Breeds. 



Forktailed Petrel. — Has occurred. 



Storm Petrel. — Is to be met with occasionally. 



This list of sea-birds, I think, will make up for the great deficiency 

 in our land Avifauna, and is one that no county need be ashamed of. 

 It comprises one hundred and twenty-one species. Thus, leaving out 

 the mealy redpole, the Avifauna of the County Dublin consists of two 

 hundred and eighteen species. 



Hakry Blake-Knox. 

 Dalkey, May 22, 1866. 



Errata. — In my former paper there are the following misprints: — Page 224, under 

 blacliheaded bunting, read "In Mayo;" not "in May." Page 226, under starling, 

 read " Ballybrack," not " Ballybrook." I have also made a serious error myself: 

 under swallow, read "Summer visitor from the second week in April," instead of 

 " from the end of April.'' — H. Blake-Knox. 



