FOSSIL BIRDS. 421 



Subfamily ANATINAE. Surface-feeding Ducks. 



Genus ANAS Linnaeus. 



Anas Linnaeus, Syst. Nat., ed. 10, I, 1758, 122. Type, by subs, desig., 

 Anas boschas Linnaeus = A. pla'yrhynchos Linnaeus (Lesson, 1828). 



Anas platyrhynchos Linnaeus. Mallard. 



Anas platyrhynchos Linnaeus, Syst. Nat., ed. 10, I, 1758, 125. 



Modern form reported from Pleistocene: Fossil Lake, Oregon; McKittrick, 

 and Upper San Pedro formation, San Pedro, California. 



Anas rubripes Brewster. Black Duck. 



A7ias obscura rubripes Brewster, Auk, XIX, No. 2, April, 1902, 184. 

 Modern form reported from Pleistocene: Itchtucknee River, Florida. 



Anas fulvigula Ridgway. Florida Duck. 



Anas obscura wax. fulvigula Ridgway, Amer. Nat., VIII, No. 2, Feb., 1874, 

 111. 



Modern form reported from Pleistocene: Seminole Field, and Bradenton, 

 Florida. 



Genus CHAULELASMUS Bonaparte. 



Chaulelasmus "G. R. Gray," Bonaparte, Geog. and Comp. List, 1838, 56. 

 Type, by monotypy, Anas strepera Linnaeus, 



Chaulelasmus streperus (Linnaeus). Gadwall. 



Anas strepera Linnaeus, Syst. Nat., ed. 10, I, 1758, 125. 



Modern form reported from Pleistocene: Itchtucknee River, Florida; Rancho 

 La Brea, Los Angeles, California. 



Genus MARECA Stephens. 



Mareca Stephens, in Shaw, General Zoology, XII, Pt. ii, 1824, 130. 

 Type, by subs, desig., Mareca fistularis Stephens = Anas penelope 

 Linnaeus (Eyton, 1838). 



Mareca americana (Gmelin). Baldpate. 



Anas americana Gmelin, Syst. Nat., I, Pt. ii, 1789, 526. 



Modern form reported from Pleistocene: Fossil Lake, Oregon; McKittrick, 

 California. 



