At 5f^ 



HERRING GULL. 

 Length, 2400 inches. Adult, back and wings pearl-gray ; end of primaries 

 marked with black ; rest of plumage white. Youngy dark grayish, primaries 

 and tail brownish black. 



PETRELS. 

 Length, 7'50 inches. Black, upper tail-coverts white. 



