254 ZOOLOGY. 



dinary ; for it is evidently the habit of the species to 

 migrate to an extreme climate during the summer 

 season. Neither did those few individuals remain long 

 with us, as we continued to cruise on nearly the same 

 spot, and in July none were seen thus far to the south- 

 ward ; although in September they again appeared in 

 increasing numbers. They alighted on the sea in large 

 flocks, and swam round the ship, feeding greedily on 

 the offal of whales. When tranquil or satisfied they 

 uttered an agreeable low whistling note, but when 

 quarrelling screamed discordantly. They were very 

 familiar, and many were taken by hook and line, baited 

 with salt pork. 



