PLATE I. 



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



Fig. 1. Luinla cirrhata, $ ad., summer. U. S. Nat. Mus. No. 89087; Bering Island, 



May 11, 1882. 

 Fig. 2. Landa cirrhaia, $ ad., winter. U. S. Nat, Mus, No. 92920 ; Bering Island, 



January 19, 1883, 



