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689. Pagopliila eburnca (Phipps). 

 Ivory Gull. 



690. Larus ridibundus, Linn. 

 Black-headed Gull. 



691. Larus melanoccplialus, Natt. 

 Adriatic Gull. 



(592. Larus Philadelphia (Ord.). 

 Bonaparte's Gull. 



693. Larus ichthyaetus, Pall. 



Great Black-headed Gull. 



694. Larus minutus, Pall. 

 Little Gull. 



695. Larus canus, Linn. 

 Common Gull. 



696. Larus gelastes, Licht. 

 Slender-billed Gull. 



697. Larus audouini, Payr. 

 Audouin's Gull. 



698. Larus argentaius, Gmel. 



Herring-Gull. 



699. Larus cachinnans, Pall. 



Yellow-legged Herring-Gull. 



700. Larus affinis, Reinh. 



Siberian River-Gull. 



701. Larus fuscus, Linn. 



Lesser Black-backed Gull. 



702. Larus marinus, Linn. 



Great Black-backed Gull. 



703. Larus glaucus, Fabr. 



Glaucous Gull. 



