U. S. NATIONAL MUSEUM 



BULLETIN 1 1 3, PL. 87 



ft.tioen I tD.BaUinidrF 



1 , 2 and 3. bonaparte's gull 

 4. Little Gull 



5. Ross's Gull 



6, 7 AND 8. SABINE'S GULL 



FOR DESCRIPTION REE PAGE 33S 



