302 Proceedings of the Royal Physical Society. 



Mr Brewster considers it highly improbable that it is a 

 hybrid between leiccopterus and glaucescens, and considers it a 

 distinct species, '* intermediate between " these species, " but, 

 perhaps, more nearly allied to the latter, to which it bears 

 about the same relation that leucopterus does to glaitcus, the 

 whole forming a group of gulls of high northern distribution." 



As Z. Kumlieni ranges easterly-and-northerly in North 

 America, whilst L. glaucescens is its more westerly -and-northerly 

 representative, I direct the attention of British Naturalists to 

 these specimens, on the possible chance that one or more of 

 the former may yet wander Britain-wards, in company with 

 other more easily recognised species. We believe that this 

 specimen is the first secured to a British collector, and I at 

 once placed it (where it ought to be placed) in the collection 

 of Mr Howard Saunders, our greatest authority on this 

 family. 



Mr Saunders informs me — in lit. — that a similar style of 

 gull has been found in Alaska, but of large size, ranging in 

 the group between L. glaucus (the larger) and L. glaucescens 

 as regards characteristics, but as large as the former. This, 

 Henshaw has named L. Nelsoni} 



The immature birds of Kumlieni are very dark, thus being 

 more allied to L. glaucescens in appearance. Mr Saunders 

 has seen the types of Kuvilieni and Nelsoni, and they appear 

 — he considers — to be " good!'"^ 



Xema SaUnii, Sabine's Gull. 



The two specimens shown to-night — one an adult male, 

 and the other an immature female of the second year — were 

 procured on drift ice in long. 60° W., and lat. 64° N., by Mr 

 Henderson. Another adult male was procured by Captain 

 Walker on July 6th, 1884, in long. 83° W., and lat. 73° N 



1 Henshaw, "The Auk," 1884, p. 250. 



2 There is anotlier and less satisfactory species — L. schistasagus (Stejneger) — 

 op. dt., "Auk," p. 231, — from the coast of Karatschatka (which has nothing 

 to do with the above group), which Mr Saunders is inclined to think is the 

 Lams affinis of the Petchora in North Russia {vide the Ibis, 1876, Seebohm). 

 [I mention it as an Arctic species in tliis connection. J. A. Ilarvie-Brown.] 



