PLATE in. 



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



Fig. 1. Fratercula corniculata, 9 <ifl'> summer. U. S. Nat. Miis. No. 89089; Bering Isl- 

 and, May 21, 1882. 



Fig. 2. Fratercula corniculata, ad., winter. Bering Island, February 24, 1883. 



Fig. 3. Fratercula corniculata, (? jun., winter. U. S. Nat. Mus. No. 92932 ; Bering Isl- 

 and, February 24, 1883. 



