PLATE VI. 



[Bulletin No. 29, United States National Mnsenm.] 



Fig. 1. Fulmarus glacialis glupischa, $ ad., white phase, winter. U. S. Nat. Mus. No. 



92908; Bering Island, February 7, 1883. 

 Fig. 2. Fulmarus glacialis glupischa, ad., dark phase, summer. U. S. Nat. Mhs. No. 



92910 ; Bering Island, May 4, 188:5. 

 Fig. 3. Larus schistisagus, ^ ad. U. S. Nat. Mus. No. 92885'; Bering Island, May 5, 



1883. 

 Fig. 4. Larvs kamtsckatchensis, g ad. U. S. Nat. Mus. No. 92889 ; Bering Island, May 21, 

 , 1883. 



