'^^■5-] Brewster on an appare7itly Nexv Gull. 217 



and secondaries mostly white on tiieir exposed surfaces, with markings of 

 dull slate-gray. Primaries : First, snow white on both webs for a ter- 

 minal space of about two inches, and white to its base on the inner web, 

 except next the shaft ; outer web (except terminally) slate-gray, shading 

 insensibly into white near the base of the feather and bordered by a stripe 

 of about its own width, but of a lighter shade, on the inner web next the 

 shaft, which is strongly tinged with the same color. Second, with the 

 gray confined to a space of about four inches on the outer web, where it 

 touches the shaft for a distance of scarcely more than an inch, receding 

 from it very gi-adually- towards the base, abruptly in the other direction, 

 at both ends tapering to a point on the margin of the feather; the base of 

 this primary is tinged on both webs with the color of the mantle, which, 

 on the inner web, fades imperceptibly into white about three inches from 

 the tip, but on the outer is deepest at the point of junction with the gray 

 stripe, where the line of demarkation is nevertheless perfectly distinct; 

 there is also an indication of a sub-terminal bar in a transverse spot of 

 dusky on the inner web about half-an-inch from the tip. Tkh-d, with the 

 gray occupying the entire outer web for a space of rather more than two in- 

 ches at its basal end, tapering gradually away from the shaft, as in the sec- 

 ond primary, but at the other extremity crossing the inner web of the 

 feather and forming a well-defined and continuous sub-terminal bar of 

 about half-an-inch in width, which confines the white to a rounded terminal 

 spot and a short space on the inner web, the remainder of the feather being 

 tinged with the color of the mantle. Fourth, with the slate paler and more 

 restricted but still forming a perfect sub-terminal bar. Fifth, with the gray 

 confined to two transverse sub-terminal spots on the opposite edges of the 

 feather and separated by a wide space of white next the shaft; this feather 

 is otherwise similar to the remaining primaries, which, with all the second- 

 aries, are perfectly plain and concolor with the back to within about two 

 inches of their tips where their pearly-blue color changes rather abruptly 

 into pure white. 



"Iris cream-color; bill yellow with vermilion spot on lower man- 

 dible ; orbital ring reddish-purple ; legs and feet flesh-color" (mem. on 

 label). 



Dimensions. ''Length 24.00" ; wing, 16.25; culmen (chord from feath- 

 ers), 1.7s; bill from nostril, .85; do. from gape, 2.60; height at anterior 

 end of nostril, .65 ; height at angle, .61 ; tarsus, 2.35; middle toe and claw, 

 2.27 ; tail, 6.65. 



Habitat. Cumberland Sound (Kumlien) and Greenland.? (Bruch), mi- 

 grating south in winter to the Bay of P'undy and Grand Menan. 



The following measurements are of Mr. Merrill's, Mr. Smith's, and Mr. 

 Welch's specimens, respectively : (5", adult (winter pi.). Grand Menan, 

 N. B., Jan. 21, 1883. Length, "23.75"; wing, 17.00; culmen, 1.85; bill 

 from nostril, .89; gape, 2.75; height at nostril, .65; do. at angle, .65; tar- 

 sus, 2.30; middle toe and claw, 2.28; tail, 7.22. 



Immature, sex.? Bay of Fundy, Feb., 1883. "Length, 23.50; extent 

 50.00"; wing, 15.50; culmen, 1.65; bill from nostril, .89; gape, 2.50; 



