441 



These markings are generally distributed over the surface of the egg. Dr. E. Rey writes to us 

 that the average size of the eggs of this bird in his collection is 52 - by 34 - 7 millimetres. 



The figures and descriptions are from specimens in our own collection, the summer plumage 

 being drawn from a skin procured by Dahlberg in Lapland, and given to us by Professor 

 Sundevall, and the winter dress being taken from a bird shot at Cookham by Mr. Joseph Ford. 

 The young nestling is described from a specimen in the collection of Mr. J. H. Gurney, jun. 



In the preparation of the above article we have examined the following specimens : — 



E Mus. Sliarpe and Dresser. 



a. Quickjock, Lapland {A. Dahlberg). b. Christiaiiia {Collett). c,d. Cookham, Berks {J.Ford), e. Pagham, 

 Sussex {A. Grant), f. Smyrna {Dr. Kriiper). g. Crimea {W. Schliiter). 



E Mus. J. H. Gurney, jun. 

 a, b, c. Greatham, Durham {J. H. G.). d. Seaton, Durham (/. H. G.). e. Teesmouth {J. H. G.). 



E Mus. Howard Saunders, 

 a, b. Orkneys (/. Dunn), c. Malaga {H. S.). 



E Mus. H. B. Tristram, 

 a. Orkneys (J. Dunn), b. Plain of Acre {H. B. T.). 



