64 
tute of nostrils, but on each side of the 
upper mandible towards the base, is a den- 
tation that divides the margin, and thus 
admits of considerable motion. In the act 
of respiration, there appears to be always 
some air propelled between the skin and 
the body of the bird, as a visible expansion 
and contraction is observed about the 
breast, and this singular conformation 
makes the bird so buoyant, that it floats 
on the water, and not sunk beneath its 
surface, as observed in the Corvorant and 
Shag. 
This bird goes as far south as theTagus* 
to feed on Sardines, a species of fish some- 
what resembling the Sprat ; and according 
to Acerbi it is found as far north as the 
Gulf of Bothnia. Bewick says " they are 
said to be met with in great numbers about 
New Holland and New Zealand: they 
breed also on the coart of Newfoundland, 
and migrate southward along the American 
shores as far as South Carolina : they are 
noticed, indeed by navigators, as being 
met with, dispersed over both hemispheres, 
and are probably one great family spread 
over the whole globe." 
