ORDER PALMIPEDES. 579 



Kittiwake Gull, Lath. L. Tridactylus and L. Rissa, 

 Gm. Briss. vi. 16. 1 and 17, 2. 



Very like Ridibundus, is distinguished, nevertheless, 

 by a short and imperfect thumb. The young is 

 more or less spotted with brown and black. Enl. 387. 

 From the goelands and common gulls have been 

 distinguished 



The Stercoraires, Briss. Labbes, BufF. Lestris,* 



Illiger. 



Have the nostrils membranaceous, larger than in 

 the others, with their orifice nearer their point, and 

 the edge of the bill ; their tail is pointed. They 

 pursue bitterly the little gulls, to take from them 

 theu' food, and even, according to what some say, to 

 devour their excrement ; whence their name. 



Arctic Gull, Lath. L. Parasiticus, Gm. Enl. 762. 

 Edw. 148. 



Is deep-brown, above ; white, underneath ; the 

 two middle quills of the tail are twice the length of 

 the rest. It is very rare here ; the young is entirely 

 brown, and is then the Larus Crepidatus, Gm. Enl. 

 991, and better, Edw. 149. 



Skua Gull, Lath. Larus Cataractes, Gm. Brit. 

 Zool. pi. L. 6. 



Of the Arctic regions ; as big as a goeland ; brown, 

 with the base of the quills of the wings white. 



• A>i(TT5if, Thief. The name of the bird among the Swedish fishermen. 

 M. Vieillot has changed it to Stercoreus. 



p p 2 



