36 



569. Sterna caspia, Pall. 



Caspian Tern. 



570. Sternq, anglica, Mont. 



GuU-billed Tern. 



571. Sterna cantiaca, Gmel. 



Sandwicli Tern. 



572. Sterna fuliffinosa, Gmel. 



Sooty Tern. 



573. Si/drochelidon hyhrida (Pall.). 



Whiskered Tern. 



574. Hiidrochelidon leucoptera (SoMnz). 



White-winged Black Tern. 



575. Hijdrochelidon nigra (Linn.). 



Black Tern. 



Subfamily Laein^. 



576. Xnna sahinii (Sabiae). 



Sabine's Gull. 



577. Rhodostethia rosea (MacgiU.). 



Cuneate-tailed Gull. 



578. Pagophila ehirnea (Phipps). 



Ivory Gull. 



579. Larus ridihundus, Linn. 



Black-headed Gull. 



580. Larus melanocephalus, Natt. 



Adriatic Gull. 



581. Larus ichthyaetus, Pall. 



Great Black-headed Gull. 



582. Larus minutus, Pall. 



Little Gull. 



683. Larus eatius, Linn. 

 Common Gull. 



584. Larus gelastes, Licht. 



Slender-billed Gull. 



585. Larus ai/dotiim', Payr. 



Audouin's Gull. 



586. Larus argentatus, Gmel. 



Herring-Gull. 



587. Larus kv/;ophcEus, Bruch. 



Yellow-legged Herring-Gull. 



588. Larus affinis, Reinh. 



Siberian Herring-Gull. 



589. Larus fuscus, Linn. 



Lesser Black-backed Gull. 



