574 CLASS AVES. 



GOELANDS, 



The large species, which are bigger than a duck. 



Blax;k-headed Gull. Larus Marinus and Ncevius, 

 Gm. Enl. 990, adult, and ^QQ, young. 



Is one of the largest, which, at first spotted with 

 white and grey, becomes finally altogether white, 

 with a black mantle ; the bill is yellow, with a red 

 spot underneath ; the feet are reddish, and Pen. 

 Brit. Zool. t. Z/., and not PI. Enl. according to Tem- 

 minck. 



Glaucous Gull. L. Glaucus, Gm. Naum. 

 1st. Ed. 36. 



This differs only in having the mantle of a bright 

 ash-colour. The young is also spotted. 



M. Temminck also distinguishes, 



Herring Gull. L. Argentatus, Lath. Enl. 253. 



Mantle, bluisli-grey ; quills, black at the point, tipped 

 with white, reaching much beyond the tail ; shaft, 

 black ; first primary only with a white spot beside 

 the narrow tip ; tarsus, nearly three inches long ; 

 nostrils, linear. Europe and America. 



Larus Leucomela, Vieill. 61. 

 Head and mantle, black. 

 Larus Paci/icuS) Lath, is perhaps the young. 



The Mauve, or Mouettes, 

 Are smaller species. 



