656 



GA 



LARTD^E. 



LARIDtf. 



PAGOPHILA EBUBNEA (Phipps*). 

 THE IVORY GULL. 



Lams eburneus. 



PAGOPHILA, JTattpf. Bill shorter than the head, robust, compressed, straight, 

 the upper mandible decurved towards the tip, lower mandible narrower ; nostrils 

 basal, linear, oblong, wider in front, covered above and behind with a sloping 

 thin-edged plate. Wings long, pointed, the first quill longest. Tail rather long, 

 slightly graduated. Legs short, bare for a short distance above the tibia ; tarsi 

 broadly scutellate in front, and minutely at the sides and back ; interdigital 

 membranes emarginated and serrated ; claws strong and curved ; hind toe 

 furnished with a large claw, and connected on the inside with the tarsus by 

 a well-defined web. 



* Larus eburneus, Phipps, Voy. towards North Pole, p. 187 (1774). 

 t Natiirl. Syst. pp. 69, 186 (1829) ; from irayos, a pointed rock, and 

 I love. 



