Vol. II., Plate 11. 





: 



(ABOUT 2-5THS NATURAL SIZE.) 



Nestlings in Down of : 1, The Herring-Gull (Lams a. argentatus). 2, The Black-headed 

 Gull (L. r. ridibundus). 3, The Kittiwake (Rissa t. tridactyla). 4, The Arctic Skua (Stercor- 

 arius parasiticus). 5, The Common Guillemot (Una t. troille). 6, The "Black Guillemot 

 (U. g. grylle). 7, The Razorbill (Alca torda). 



[Face p. 752.] 



