42 A YORKSHIRE NATURALIST 



successful, the Skua immediately gives chase to him, 

 and makes him disgorge his prey, which prey the 

 Skua catches before it reaches the water. But on 

 shooting one of these buccaneers of the sea, they 

 were unable to identify it with any of the known 

 forms of Arctic birds. Further examination, how- 

 ever, showed it to be a new species of the genus 

 now known as Pomerine Skua. 



