212 



The eggs of the Great JBlack-backed Gull vary but little. In 

 shape they are regular ovals, sometimes broad, sometimes narrow. 

 In the large series in the Collection, one egg is of a plain blue 

 colour, and another is blue with a few brown markings, but the re- 

 maining specimens exhibit little variety. The ground of all is of a 

 pale creamy buflf or light stone-colour with an olive tinge. The 

 markings, which are of a yellowish-brown or blackish-brown colour, 

 •with some underlying pale purple,' are of small size and are very 

 evenly distributed over the shell, only in rare cases forming an 

 approach to a cap or zone at the large end. A few examples exhibit 

 somewhat larger blotches. The eggs measure from 2'7 to 32 iu 

 length, and from 2 to 2-2 in breadth. 



Sukkenstappen, West Greenland. 

 Faroe Islands, 29th May (H. C. 



Mailer: Haryitt. Coll.). 

 Shetland Islands {R. Dunn). 

 Stromnesa, Orkneys (R. Dunn : Har- 



gitt Coll.). 

 Souliskerry, Orkneys, 15th June 



(Hargitt Coll.). 

 Loch Ashie, Inverness (^Hargitt 



Coll.). 

 Bass Rock, Firth of Forth. 

 Saltee Islands, Ireland, 27th May 



(H. S. ^ v.). 

 Saltee Islands, 27th May. 

 Cumberland (Heysham). 

 Lundy Island, Bristol Channel, May 



(H. Saunders). 

 Lundy Island, 25th May {H. S.). 

 Lundy Island, 1st June {H. S.). 

 Lundy Island, 3rd June {II. <S'.). 

 Tromso, Norway, 11th June {II. 



Seebohm). 

 Tamso, Finmark. 

 Triktiln Island, Smolen Islands, 



26th May {R. B. Sharpe). 

 Triktiln Island, 26th May {R. B. S.). 

 Triktiln Island, 28th May {R. B. S.). 

 Triktiln Island, 28th May (iJ. B. S.). 

 Sandhavn, Sweden, May. 



Seehohm Coll. 

 Seebohm Coll. 



Seehohm Coll. 

 Seebohm Coll. 



Seebohm Coll. 



Seebohm Coll. 



Salvin-Godraan Coll. 

 Seehohm Coll. 



Seebohm Coll. 

 Gould Coll, 

 Saunders Coll. 



Saunders Coll. 

 Saunders Coll. 

 Saunders Coll. 

 Seebohm Coll. 



Seebohm Coll. 



Dr. R. Bowdler Sharpe [P.]. 



Dr. R. Bowdler Sharpe [P. 

 Dr. R. Bowdler Sharpe " 

 Dr. R. Bowdler Sharpe 

 Seebohm Coll. 



:?•]• 



Larus dominicanus, Idcht. 



Larus dominicanus, Thien. Fortpflanz. ges. Vog. tab. Ixxxviii. fio-. 2 

 (1845-54); Abhott, Ibis, 1861, p. l65 ; Potts, Tr. N. Z. Inst. ii. 

 p. 75 (1869): Sharpe, Phil. Tram. 168. p. 107 (1879); id. ed. 

 Layard, Birds S. Africa, p. 697 (1875-84) ; Saunders, Zool. ' Chal- 

 lenger ' Exped. ii. pt. viii. p. 139 (1880) ; Scl. t. c. p. 151 (1880) ; 

 Buller, Birds Nezv Zeal. 2nd ed. ii. p. 47 (1880) ; Saunders, Cat. 

 Birds B. M. xxv. p. 245 (1896) ; Sharpe, Hand-l. i. p. 141 (18991 ; 

 -ffa«,/6ts, 1900, p. 10. ^ ^ ^' 



Larus antipodus, Thien. Fortpflanz. ges. Vog. tab. xic. fig. 2 (1845-54). 



The eggs of the Southern Black-backed Gull closely resemble 



