LIST OF PLATES. 379 



Plate CXX. 



Fig. 265. The Hooded Sheldrake (Mergus cucullatus). 



266. The Red-breasted Sheldrake (Merganser serrator). 



Plate CXXI. 

 Fig. 267. The Double-crested Cormorant (Phalacracorax dilophus). 

 268. Ditto, immature. 



Plate CXXII. 

 Fig. 269. The American Gannet, young (Sula americana). 

 270. The Winter Gull (Larus argentatus). 



Plate CXXIII. 

 Wilson's Petrel (Thalassidroma wilsoni). 

 The Black Skimmer (Rhynchops nigra). 



Plate CXXIV. 

 The Silvery Tern (Sterna argentea). 

 The Sandwich Tern (Sterna cantiaca). 



Plate CXXV. 

 The Common Tern (Sterna hirundo). 

 Ditto, young. 



Plate CXXVI. 



The Cayenne Tern (Sterna cayana). 

 The Black Tern (Sterna nigra). 



Plate CXXVII. 



The Marsh Tern (Sterna anglica). 

 The Roseate Tern (Sterna dougalli). 



Plate CXXVIII. 



Sabine's Gull (Larus sabini). 



The Common American Gull (Larus zonorhyncus). 



Plate CXXIX. 

 The Great Black-backed Gull (Larus marinus). 

 The Winter Gull (Larus argentatus). 



Plate CXXX. 

 The Common American Gull (Larus zonorhyncus). 

 The Winter Gull, var. (Larus argentatus). 



Plate CXXXI. 

 Figs. 287, 288. Bonaparte's Gull (Larus bonaparti). 



Plate CXXXII. 

 290. The Laughing Gull, young (Larus atricilla). 



Plate CXXXIII. 

 The Arctic Hawk Gull (Lestris buffoni). 

 The Pomarine Hawk Gull (Lestris pomarinus). 



Plate CXXXIV. 

 Richardson's Hawk Gull (Lestris richardsoni). 

 The Little Shearwater (Puffinus cinereus). 



