472 
LAMELLIROSTRAL SWIMMERS — ANSERES. 
white, interrupted only on the nape, and with oblique streaks running upward for an inch outside 
the ring. Upper parts, breast, and abdomen uniform dark brownish plumbeous, the rump, prima- 
ries, and secondaries approaching black. Anal region, crissum, sides of the rump, and upper tail- 
coverts immaculate snow-white. Tail uniform black. Feathers of the sides and flanks with very 
Bernicla nigricans. 
broad white tips, these almost concealing the dusky of the basal portion. Bill and feet deep black ; 
tarsi dark reddish (black in life ?). Wing, 13.40 inches ; culmen, 1.35 ;. tarsus, 2.50 ; middle toe, 
2.00, loujig (No. 61963, 9, Unalakleet, Alaska, Sept. 28, 1867 ; W. H. Dall) : Similar to the 
adult, but collar obsolete, greater wing-coverts and 
secondaries broadly tipped with pure white, and 
feathers of the sides and flanks uniform brownish 
gray, without white tips. 
A very curious specimen from Northern Europe 
(No. 57167, “holier Norden;” Schliiter Coll.) is 
exactly intermediate between this species and B. 
brenta, and is probably a hybrid. It has the uni- 
form colors of the body characteristic of the B. 
nigricans ; but the shade is rather lighter, present- 
ing a more appreciable demarcation of the black of 
the jugulum, and has a more bluish cast — the 
wing-coverts in strong and abrupt contrast with 
the black secondaries. The white of the neck is in 
two opposite isolated crescents, as in bernicla. It 
measures as follows : Wing, 12.85 inches ; culmen, 
1.25 ; tarsus, 2.30 ; middle toe, 1.75. 
This form is very closely allied to the 
common Brant Goose, and takes its place 
on the Pacific coast, where the latter does 
not seem to occur. The present species is quite rare on the eastern coast. Mr. Hen- 
