142 



Synopsis. 



ORDER VI. SWIMMERS. Continued. 



Herring Gull. 

 Arctic Skua. 

 Pomarine Skua. 

 Glaucous-winged Gull. 

 Ross's Gull. 

 Franklin's Gull. 

 Fork-tailed Gull. 

 Common Gull. 

 Glaucous Gull. 

 White-winged Gull. 

 Ring-billed Gull. 

 Swallow-tailed Gull. 

 Ivory Gull. 

 Laughing Gull. 

 Bonaparte's Gull. 

 Kittiwake Gull. 

 Marsh Tern. 

 Caspian Tern. 

 Wilson's Tern. 

 Arctic Tern. 

 Least Tern. 

 Sooty Tern. 

 Roseate Tern. 



Great Northern Diver. 

 Red-throated Diver. 

 Red-necked Grebe. 

 Crested Grebe. 

 Horned Grebe. 

 Pied-billed Grebe. 

 Leach's Petrel. 

 Wilson's Petrel. 

 Greater Shearwater, or 



Petrel. 



Wandering Shearwater. 

 Mank's Shearwater. 

 Dusky Shearwater. 

 Great Auk. 

 Razor-billed Auk. 

 Little Auk. 

 Arctic Puffin. 

 Large-billed Guillemot. 

 Large-billed Puffin. 

 Black Guillemot. 

 Foolish Guillemot. 

 Murre. 

 Arctic Sea Dove. 



