554 WHITE- WINGED SILVERY GULL. 



at the end of the angle, which is long and narrow, the dorsal line then 

 nearly straight and ascending, the sides flat and slightly inclined, the 

 edges sharp and inflected. 



Head rather large. Neck of moderate length. Body rather full. 

 Wings very long. Feet of moderate length, rather slender ; tibia bare 

 below ; tarsus somewhat compressed, covered before with numerous broad 

 scutella, laterally and behind with roundish scales, on the outer side also 

 with a row of small scutella ; toes of moderate length, rather slender, all 

 covered above with scutella ; the anterior connected by reticulated webs, 

 the two lateral with an external thick margin ; the first extremely small, 

 the third longest, the fourth longer than second ; claw of hind toe small- 

 est, of third largest, with an inner thin edge, of second next in size, all 

 more or less compressed and obtuse. 



The plumage in general is close, elastic, very soft and blended, on the 

 back rather compact. Wing svery long, broad, pointed ; primaries tapering, 

 the first longest, the second slightly shorter, the rest rapidly graduated ; 

 secondaries broad and rounded, the inner elongated and rather narrow. 

 Tail of moderate length, even, of twelve broad feathers. 



Bill gamboge-yellow, with a spot of orange-red near the end of lower 

 mandible ; the angle of the mouth and the edges of the eyelids are also 

 orano-e-red. Iris pale yellow. Feet pale flesh-colour ; claws greyish- brown. 

 The whole plumage is pure white, excepting the back and upper surface 

 of wings ; the tips of the secondaries, the terminal third or s6 of the pri- 

 maries, their shafts, and the upper tail-coverts also white. 



Length to end of tail 26 inches, to end of wings 28;^ ; extent of wings 

 50 ; bill along the back If, along the edges 2^ ; tarsus 2^, middle toe 2^^, 

 its claw ^*| ; wing from flexure 1T| ; tail 6|. 



Young in winter. Plate CCLXXXII. Fig. 2. 



Bill yellow, the tips black. Edges of eyelids pale reddish- orange ; iris 

 brown. Feet yellowish flesh colour ; claws greyish-brown. The plumage 

 is vellowish-grey, marked on the head and neck with longitudinal streaks 

 of pale brown, on the back and wings with transverse undulations, those- 

 on the tail much fainter ; the first six quills destitute of markings. 



