NO. 5 CHECK-LIST OF FOSSIL BIRDS — WETMORE 7 



Order GAVIIFORMES : Loons 



Family GAVIIDAE : Loons 



Subfamily GAVIINAE 



Genus GAVIA Forster 



Gavia J. R. Forster, Enchirid. Hist. Nat., 1788, p. 38. Type, by subsequent 

 designation, Colymbus imber Gunnerus =: C. immer Briinnich (Allen, 

 1907). 



Gavia immer (Brunnich) : Common Loon 

 Colymbus Immer Brunnich, Orn. Borealis, 1764, p. 38. 



Modern form reported from late Pleistocene (Palos Verdes sand) ; 

 Newport Bay, Orange County, California. 



Gavia arctica (Linnaeus) : Arctic Loon 



Colymbus arciicus Linnaeus, Syst. Nat., ed. 10, vol. i, 1758, p. 135. 



Modern form reported from late Pleistocene (Palos Verdes sand) : 

 San Pedro, Los Angeles County, California. 



Gavia concinna Wetmore 



Gavia concinna Wetmore, Journ. Morph., vol. 66, No. i, Jan. 2, 1940, p. 25, 

 figs. 1-4. 



Pliocene (Etchegoin formation) : Sweetwater Canyon (type lo- 

 cality), 5^ miles east of King City, Monterey County, California. 

 Middle Pliocene (San Diego formation) : Washington Boulevard 

 Freeway, San Diego, California. Pliocene (Bone Valley formation) : 

 near Brewster, Polk County, Florida. 



Gavia palaeodytes Wetmore 



Gavia palaeodytes Wetmore, Proc. New England Zool. Club, vol. 22, June 23, 

 1943, p. 64, figs. 1-2. 



Middle Pliocene (Bone Valley formation) : Pierce (type locality) 

 and Brewster, Polk County, Florida. 



Gavia howardae Brodkorb 



Gavia howardae Brodkorb, Condor, vol. 55, No. 4, July 20, 1953, p. 212, fig. iB. 



Pliocene (Bone Valley formation) : Pierce (type locality) and 

 Brewster, Polk County, Florida. 



Subfamily GAVIELLINAE: Gaviella 



Genua GAVIELLA Wetmore 



Gaviella Wetmore, Journ. Morph. vol. 66, Jan. 2, 1940, p. 28. Type, by original 

 designation, Gavia pusilla Shufeldt. 



