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richardsoni, Wils. ; but I am quite unable to find out where this name has been published — 

 certainly not in the ' Illustrations of Zoology,' as there the species is called Larus rossii. 



I may remark with regard to the specimen in the collection of Lady Georgiana Milner, that 

 two totally different accounts are given of it, and it appears most probable that Sir. W. Milner 

 was imposed on. He says (Zool. 1847, p. 1694) that it was killed on the 22nd December 1846 

 by one Eobinson, of Saxton, near Aberford, Yorkshire. On the other hand, Charlesworth, in 

 Proc. Yorksh. Phil. Soc. (reprinted Zool. 1847, pp. 1782 et seqq.), quotes a note from Sir W. 

 Milner's brother to the effect that it was killed by one Horner, in February 1847, near Milford 

 cum Kirby, in the parish of Kirby. 



The specimens figured are the adult bird, in full breeding-dress, in the Derby Museum at 

 Liverpool, and the winter-killed example in the Milner collection. I need scarcely add that I 

 do not possess a specimen of this rare Gull. 



In the preparation of the above article I have examined the following specimens : — 



E Mus. Cantabr. 

 a, ad. ptil. ast. Gronne Eiland, Disco Bay, Greenland, 1859 {Dr. Pfaff). 



E Mus. Derb. 

 a, ad. ptil. cest. Alagnak, Melville Peninsula, June 27th, 1823. 



E Miis. Lady Georgiana Milner. 

 a, ptil. Mem. Yorkshire, February 1847?. 



3z 2 



