54 
GLAUCOUS GULL OR BURGOMASTER. 
inches. The eggs of this Gull are pale purplish-grey, with scattered spots 
of umber-brown, and subdued lavender-purple.” 
My figures were taken from specimens kindly presented to me by my 
friend Captain Jambs Clarke Ross, R. N. 
Larus glaucus, Bonap. Syn., p. 361. 
Larus glaucus, Burgomaster Gull, Swains, and Rich. F. Bor. Amer., vol. ii. p. 416. 
Glaucous Gull or Burgomaster, Nutt. Man., vol. ii. p. 306. 
Glaucous Gull or Burgomaster, Lams glaucus, Aud. Orn. Biog., vol. v. p. 69. 
Adult, 30 ; wing, 195. 
Met with in Labrador in summer. Baffin’s Bay and Arctic Seas gene- 
rally. Not observed within the limits of the United States. 
Adult Male. 
Bill shorter than the head, stout, compressed, higher near the end than 
at the base. Upper mandible with the dorsal line nearly straight for half 
its length, declinate and arched towards the end, the ridge convex, the sides 
very rapidly sloping and slightly convex, the edges sharp and somewhat 
inflected, the tip rather obtuse. Nasal groove rather long and narrow ; 
nostrils in its fore part, lateral, longitudinal, linear-oblong, wider anteriorly, 
pervious. Lower mandible with the angle long and narrow, the outline 
of the crura decurved toward their junction, where there is a prominence, 
beyond which the outline ascends and is slightly concave, the sides erect 
and nearly flat, the edges sharp and a little inflected. 
Head large, ovato-oblong, narrowed anteriorly. Neck of moderate length, 
strong. Body full. Feet of moderate length, rather slender ; tibia bare for 
three-quarters of an inch ; tarsus somewhat compressed, covered anteriorly 
with numerous much curved scutella, laterally with angular scales, behind 
with numerous small rectangular scales ; hind toe very small and elevated, 
the fore toes of moderate length, slender, the fourth longer than the second, 
the third longest, all scutellate above, and connected by reticulated entire 
membranes, the lateral toes margined externally with a thick narrow mem- 
brane. Claws small, slightly arched, depressed, rounded, that of the middle 
toe with an expanded thin inner margin. 
The plumage is very full, close, elastic, soft, and blended, on the back 
somewhat compact. Wings very long, rather broad, acute ; the first quill 
scarcely two-twelfths of an inch shorter than the second, which is longest, 
the rest of the primaries rapidly graduated ; secondaries broad and rounded. 
Tail of moderate length, nearly even, being slightly rounded, ^ of twelve 
broad rounded feathers. 
Bill gamboge-yellow, with a carmine patch towards the end of the lower 
