CATALOGUE. Ts 
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, (L.) 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. 
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