458 CHECK-LIST OF NORTH AMERICAN BIRDS. 



Genus HYDROTHERIKORNIS Miller. 



Hydrolherikornis A. H. Miller, Univ. Calif. Publ., Bull. Dept. Geol. Sci., 

 XX, No. 3, April 21, 1931, 24. Type, by orig. desig., Hydrolherikornis 

 oregonns Miller. 



Hydrotherikomis oregonus Miller. 



Hydrolherikornis oregonus A. H. Miller, Univ. Calif. Publ., Bull. Dept. 

 Geol. Sci., 20, No. 3, April 21, 1931, 24, fig. 1. 



Upper Eocene (Arago Series) : Sunset Bay, near Coos Bay, Coos County 

 Oregon. 



Subfamily ALCINAE. Auks and Murres. 



Genus URIA Brisson. 



Uria Brisson, Orn., 1760, I, 52; VI, 70. Type, by tautonymy, Uria 

 Brisson = Colymbus aalge Pontoppidan. 



Uria affinis (Marsh). 



Calarractes affinis Marsh, Amer. Journ. Sci., ser. 3, IV, Oct., 1872, 259. 

 Pleistocene: Near Bangor, Maine. 



Uria antiqua (Marsh). 



Calarractes anliquus Marsh, Amer. Journ. Sci., ser. 2, XLIX, March, 

 1870, 213. 



Miocene: Tarboro, Edgecombe County, North Carolina. 



Genus MANCALLA Lucas. 



Mancalla Lucas, Proc. U. S. Nat. Mus., XXIV, Art. 1245, Sept. 27, 

 1901, 133. Type, by orig. desig., Mancalla calif or niensis Lucas. 



Mancalla califomiensis Lucas. 



Mancalla californiemis Lucas, Proc. U. S. Nat. Mus., XXIV, Art. 1245, 

 Sept. 27, 1901, 133, figs. 1, 2. 



Pliocene: Third Street tunnel, Los Angeles, California. 



Genus SYNTHLIBORAMPHUS Brandt. 



Synthliboramphus Brandt, Bull. Sci. Acad. Imp. Sci. St.-Petersb., II, No. 

 22, March 19, 1837, col. 347. Type, by subs, desig., Alca antiqua 

 Gmelin (Gray, 1840). 



