15 
and is said to lay two eggs ; (if so, it dif- 
fers from others of the genus, which usually 
lay but one) these eggs are larger than those 
of a pigeon, of a bluish white, 
Temminck observes that " the young of 
the first year have the top of the head, the 
parts about the eyes, the back of the neck, 
the sides of the breast and all the upper 
parts of a deep black, except the secon- 
daries which are terminated with white, 
and three or four longitudinal bands of 
pure white upon the greater coverts near 
the body ; throat pure white, as well as 
the front and sides of the neck, and all the 
under parts of the head white with some 
small dusky streaks, a narrow and faint 
band of white towards the back of the head, 
feet and legs yellowish brown, webs green- 
ish brown. Varies according to age by 
having more or less black spots upon the 
throat and upper part of the neck, and 
from wanting the bands of white upon the 
greater coverts, or having them very faint. 
Sometimes but rarely all the plumage 
wlyte." 
During the recent Voyage to the Arctic 
