BONAPARTIAN GULL. 215 
ferior series of transverse scalés, laterally with oblong scales, poste- 
riorly with oblique scutella. Toes slender, with numerous scutella; 
first extremely small, second considerably shorter than fourth, third 
longest ; anterior toes connected by reticulated webs, of which the an- 
terior margins are deeply concave, the outer and inner slightly margi- 
nate. Claws small, compressed, moderately arched, rather obtuse, that 
of middle toe with an expanded inner edge. 
Plumage full, close, soft, blended. Wings very long and pointed ; 
primaries tapering and rounded, first longest, second very little shorter, 
the rest rapidly graduated; secondaries obliquely pointed, the rounded 
extremity extending beyond the tip’ of the shaft, which is exterior to 
it, the inner feathers more elongated. Tail of moderate length, al- 
most even, the middle feathers slightly longer. 
Bill black, inside of mouth vermilion. Iris reddish hazel. Feet 
orange, slightly tinged with vermilion; claws dusky brown. Head 
‘and upper part of neck all round, greyish-black, that colour extending 
half an inch lower on the throat than on the occiput. A white band 
divided by a narrow black line margining the eye behind; the remain- 
ing part:of the neck white; back, scapulars and wings, light greyish- 
blue. The anterior ridge of the wing, alula, smaller coverts on the 
carpal margin, four outer primary coverts, shaft and inner web of the 
outer primary, both webs of second, inner webs of third and fourth 
white ; of which colour also are the rump, tail, and all the lower parts. 
Outer web of first quill, excepting a small portion towards the end, its 
tip to the length of half an inch, black, as are the ends of the next six, 
which however have a small tip of white. the black on some of them 
about an inch long, andrunning along the inner edge to a considerable 
extent: 
Length to end of tail 143 itiches, to end of wings 15%, to end of 
claws 131; extent of wings 321; wing from flexure 103; tail 45% ; 
bill along the ridge 1,4, along the edge of lower mandible 1}2; tarsus 
1; hind toe and claw #,; middle toe 1,%; its claw #4, outer toe 
14,, its claw 23; inner toe }3, its claw 7}. Weight 64 oz. 
Adult Female. Plate CCCXXIV. Fig. 2. 
The female is somewhat smaller, and resembles the male, but has 
the head and upper part of the neck umber brown. 
