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as the mouths of estuaries and sounds, subsisting on fish and crustaceans, which it obtains by- 

 diving. It is apparently a very inquisitive bird ; for I have often observed a flock of them make 

 up to a steamer going at full speed, and fly round her, sometimes returning a second time to 

 reconnoitre. It breeds on the high shelving rocks on the coast or within the sheltered arms of 

 the sea, the nests being arranged in successive tiers of considerable extent, and as closely grouped 

 together as the form of the rocks in the locality chosen as a breeding-station will admit of. I 

 have never had an opportunity of examining the eggs ; but I understand that three is the usual 

 number. 



2y 



