256 Order XVII. TuUnares 



a very different appearance from Gulls, which they 

 resemble in colour, as they float softly along, barely 

 rising above the face of the rock and falling again to 

 the level of their breeding-places. On the open sea this 

 species is well known to sealers and whalers, whom it 

 follows for the sake of the refuse and offal. It always 

 settles on the water to feed, and its diet must doubtless 

 consist mainly of fishes. 



