FOSSIL BIRDS. 423 



Genus SPATULA Boie. 



Spatula Boie, Isis von Oken, [X] 1822, Heft v (May), col. 564. Type, by 

 monotypy, Anas clypeata Linnaeus. 



Spatula clypeata (Linnaeus). Shoveller. 



Anas clypeata Linnaeus, Syst. Nat., ed. 10, I, 1758, 124. 

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



California. 



Genus AIX Boie. 



Aix Boie, Isis von Oken, XXI, 1828, Heft iii-iv (March-April), col. 329. 

 Type, by subs, desig., Anas sponsa Linnaeus (Eyton, 1838). 



Aix sponsa (Linnaeus). Wood Duck. 



Anas Sponsa Linnaeus, Syst. Nat., ed. 10, I, 1758, 128. 

 Modern form reported from Pleistocene: Fossil Lake, Oregon. 



Subfamily NYROCINAE. Diving Ducks. 



Genus NYROCA Fleming. 



Nyroca Fleming, Philos. Zool., IT, 1822, 260. Type, by tautonyray. Anas 

 nyroca GtJLDENSTADT. 



SuBGENu.'s NYROCA Fleming. 



Nyroca americana (Evton). Redhead. 



Fuligula americana Eyton, Monogr. Anatidtc, 1838, 155. 

 Modern form reported from Pleistocene: McKittrick, California. 



Subgenus ARISTONETTA Baird. 



Aristonetta Baikd, in Baird, Cassin, and Lawrence, Rep. Expl. and 

 Surv. R. R. Pac, IX, 1858, 793. Type by orig. desig.. Anas valisineria 

 Wilson. 



Nyroca valisineria (Wilson). Canvasback. 



Anas valisineria Wilson, Amer. Orn., VIII, 1814, 103, (pi. 70, fig. 5). 



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

 Lake, Oregon. 



