396 APPENDIX. 



Richardson's or to Buffbn's Skua. If 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 of the Richardson'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 Linnaeus' 

 L. paraf<iticus with Buffon'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 Linna3us' 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. 



Gsnus URIA. Type by tautonymy : Uria uria Briss. = 

 Una troille (Linn.). 



Una lomvia. Linnaeus' name for Briinnich's Guillemot is 

 undoubtedly the correct one, and antedates Sabine's 

 U. binmnichi by sixty years. 



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

 generic name dates from 1806 ; Vieillot's Mergulus 

 from 1816. 



Genus FRATERCULA. Type by monotypy and tautonymy : 

 F.fratercula Briss. =*F. arctica (Linn.). 



Genus THALASSIDROMA. Type by original designation: 

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

 is P. cequinoctialis, the Cape Hen, and this generic 

 name cannot be used for the Storm-Petrels. 



