Mr. Sasine’s Account of a new Species of Gull, 4c. 521 
of the mouth bright vermilion. ‘The irides dark, surrounded by 
a naked circle of the same colour as the inside of the mouth; a 
small white speck beneath the eye, scarcely perceptible. ‘The 
whole of the head and upper part of the neck a very dark ash- or 
lead-colour; the remainder of the neck behind and before, as 
“well as the breast and belly, pure white; a narrow black collar 
surrounds the neck at the meeting of the ash-colour and of the 
white. The back, scapulars and wing-coverts are ash-coloured, 
very much lighter than the head, but darker than the corre- 
sponding parts of the Larus ridibundus; the lower ends of the 
scapulars are tipped with white. The first five primary quill- 
feathers with black shafts, the whole outer webs of these black; 
the edge of their upper webs white to within an inch and a half 
of the tips, the white sometimes continued to the tip; the tips of 
the first and second of these quill-feathers in some white, in others 
black; the tips of the third, fourth and fifth white, giving the 
wing when closed a spotted appearance; the sixth primary quill- 
feather with a white shaft, having the web more or less black, 
but principally white, with sometimes a black spot near the end ; 
the other primaries, the secondaries, and the tertials white; the 
whole under parts of the wings white. The wings extend an inch 
or more beyond the longest feather of the tail. The legs, feet, 
and claws black; the thigh feathered to within three-eighths of 
an inch of the knee; the length of the tarse one inch and a half; 
the length of the front toes about one inch, the inner one the 
shortest; the hinder toe small, and placed high. The tail with 
its upper and under coverts white; the tail-feathers twelve, the 
outer narrower than the centre ones ; the outer tail-feathers about 
five inches long, the others in succession gradually shortening, so 
that the whole tail becomes forked by a diminution of nearly an 
inch, 
This 
