106 
Total length, 18 inches; bill, 14; wing, 8; tail, 9; tarsi, 2. 
ab. ? 
In the collection of the Zoological Society. 
Larus pracuyruynenus. Lar. capite, collo, corpore superiore, 
uropygio crissoque albis ; dorso alisque cinereis ; remige primo, ad 
pogonium externum et ad apicem, remigibusque sequentibus tribus, 
ad apicem, nigris ; remigibus secundo, tertio et quarto, notd cinered 
terminali ; quinto vittd nigrd et apice cinereo. 
Head, neck, all the under surface, rump, upper and under tail- 
coverts and tail pure white; back and wings, including the prima- 
ries, grey, passing into white on the tips of the scapularies, secon- 
daries, and all but the first five primaries,which are thus marked :— 
the outer primary has its external web and three inches of the tip of 
the inner web deep black ; the next primary is tipped with black for 
three inches and a half on its outer, and two inches and a half on 
its inner web, and has a very minute speck of grey at the extreme 
tip; the third primary is tipped with black for two inches, and has a 
small spot of grey at the extremity; the fourth is tipped with black 
for an inch and a quarter, and has a larger spot of grey at the extre- 
mity than the third; and the fifth is crossed by an irregular band of 
black near the tip three-quarters of an inch wide, the extremity 
being grey, fading into white on the margin of the inner web; bill 
primrose-yellow ; feet orange-yellow. 
Total length, 14 inches; bill, 14; wing, 121; tail, 52; tarsi, li. 
Hab, Russian America. 
The species of Ortyr exhibited were 
Ortyx parvicrisratus. Ort. cristd brevi, rectd, pallide fuscd, ad 
apicem fulvd ; fronte fulvd ; guld et vittd per latera capitis ferru- 
gineo-rubris ; torque collari antice angustd, postice latd, nigrd, 
albo guttatd et castaneo tinctd; corpore superiore cinereo-nigro 
et fusco adsperso ; pectore rufo, singulis plumis guttis sex pallide 
Julvis, et saturate fusco circumdatis, ornatis ; his apud latera et 
abdomen grandioribus et fusco-nigrescente. 
Crest short, straight, light brown tipped with buff; forehead buff; 
throat and a broad stripe down each side of the head, above and be- 
hind the eye, rusty-red ; ear-coverts brown; collar surrounding the 
neck narrow in front and broad, behind black, spotted with white 
and stained with chestnut ; centre of the back, between the shoulders, 
minutely freckled grey, brown and black; remainder of the back 
blackish brown, each feather freckled on the margin with grey ; sca- 
pularies freckled grey and brown, and ornamented on their inner 
webs with large patches of dark brown; wing-coverts freckled, and 
with a large spot of dark brown and another of white near the ex- 
tremity of each feather ; primaries jight brown fringed with greyish 
white, and a few indistinctly barred with freckles of the same on 
their outer webs; tail brown, crossed by narrow freckled bands of 
whitish and darker brown ; across the breast a band of greyish red 
blotched with a darker tint; breast rufous, each feather with six 
spots of light buff encircled with dark brown, the spots gradually 
