IN THE HANCOCK COLLECTIOJT. 371 



Case 



,, 3 (right). First plumage. 



Shot at Newbiggin by T. Robson, Sept., 1840. 

 ,,4 (left). Immattjee, changing plumage. 



Found dead at Shotley Bridge, Oct. 31st, 1891. 

 Stuffed and presented by John Jackson. 



Genus. LARUS. 



26. Glaucous Gull. Larus glaucus, Briinn. 

 No. ] . YoTJNG, in first plumage. 



Presented by George Burnett, jun., Esq. 



27. Glaucous Gull. 



No. 1. Male, immature. Changing plumage. 



Newton-by-the-Sea, Oct., 1892. 

 Shot, stuffed and presented hy John Jackson, Nov., 1892. 



28. Glaucous Gall. 



No. 1. Female, mature. "Winter plumage. 



Shot near Alnwick, Feb., 1837. 



29. Glaucous Gull. 



No. 1 (left). Downy State. 

 ,, 2 (right). Summer plumage. Davis Straits, 1834. 



Presented by John Hancock. 

 From Old Museum Collection. 



30. Great Black- backed Gull. Larus marinus, 



Linn. 

 No. 1. YoTJNG. First plumage. 



Presented by Mr. Moffatt, Twizell. 



31. Great Black-backed Gull. 



No. 1. Matuee. "Winter plumage. 



Newton-by-the-Sea, 1833, 



Presented by "W. Forster, Esq. 



