IN THE HANCOCK COLLECTION. 99 



Case 



No. 3 (right). First plumage. 



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

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



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

 Stuffed and presented by John Jackson. 



Genus. LA R US. 



26. Glaucous Gull. Larus glaucus, Briinn. 

 No. 1 . Young, 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 by John Jackson, Nov., 1892. 



28. Glaucous Gull. 



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. Young. First plumage. 



Presented by Mr. Moffatt, Twizell. 



31. Great Black-backed Gull. 



No. 1. Mature. Winter plumage. 



Newton-by-the-Sea, 1833. 



Presented by W. Forster, Esq. 



