396 APPEKDIX. 



Richardson's or to Buffon's Skua. I£ we consult the 

 1st edition of the 'Fauna Suecica' and the travels in 

 West Gothland, on which the diagnosis in the Syst. 

 Nat. is based, we there find that he gives a most detailed 

 account of the habits o£ the Eichardson's or Parasitic 

 Skua, an account which cannot possibly refer to the 

 Buffon's or Long-tailed Skua. 



The question was discussed at length by Saunders 

 (P. Z. S. 1876, p-. 327) : he identified Linnseus' 

 L. parasiticus with BufEon's Skua, and his identi- 

 fication was followed in the 1st edition of the List. 

 Later on, Stejneger (Proc. U.S. Nat. Mus. v. 1882, 

 p. 40) and Lonnberg (Zool. 1903, p. 338) came to the 

 opposite conclusion, and their views are here followed. 



As Linnaeus' name, L. parasiticus, is used for 

 Richardson's Skua, Buffon's Skua will have to bear 

 that of Vieillot, S. longicauda, dating from 1819. 



Genus ALCA. • Type by Linnean tautonymy, and also by 

 subsequent designation of Newton (Ibis, 1876, p. 99): 

 A, torda Linn. 



Genus UEIA. Type by tautonymy : Uria uria Briss. = 

 Uria troille (Linn.) . 



Uria lomvia. Linneeus' name for Briinnich's Guillemot is 

 undoubtedly the correct one, and antedates Sabine's 

 U. bi'unnichi by sixty years. 



Genus ALLE. Type by monotypy : A. alle (Linn.). This 

 generic name dates from 1806; Vieillot's Mergulus 

 from 1816. 



Genus PRATERCTJLA. Type by monotypy and tautonymy : 

 F. f rater cida Briss. = i^. arctica (Linn.). 



Genus THALASSIDEOMA. Type by original designation: 

 T. pelagica (Linn.). The type of the genus Procellaria 

 is P. cBquinoctialis, the Cape Hen, and this creneric 

 name cannot be used for the Storm-Pctrels. 



