CATALOGUE. 73 



rock the appearance of being covered with snow. While on 

 Bird Rock I had the pleasure of seeing them diving at a 

 school of fish. It appeared to me as if some one was pour- 

 ing beans from a pail, so thickly did they dive. Thousands 

 of them seemed to go down in one continuous stream. 

 Each bird must consume a wonderful amount of fish in a 

 year. I have taken as many as six small mackerel out of 

 the stomach of one Gannet. While flying, they sometimes 

 emit a cry resembling, a harsh laugh. 



95. GRACULUS CARBO, (Z.) Gray. 

 (Common Cormorant.) 



Common, and is said to breed on some of the islands. 



96. LARUS MARINUS, L. 

 (Great Black-backed Gull.) 



First observed July 21, and became common in August, 

 collecting together in large flocks. 



