FOSSIL BIRDS. 377 



Apat6mis celer (MARSH). [2.] 



Ichthyornis celer MARSH, Amer. Journ. Sci., ser. 3, V, 1873, 74. 



Cretaceous (Niobrara); Kansas. 



SUPERORDER ODONTOL(LE. 

 ORDER DROM^EOPAPPI. 



FAMILY HESPERORNITHIDJE. 

 GENUS HESPERORNIS MARSH. 



Hesperornis MARSH, Amer. Journ. Sci., ser. 3, III, 1872, 360. Type, by 

 monotypy, Hesperornis regalis MARSH. 



Hesper6rnis crassipes (MARSH). [10.] 



Lestornis crassipes MARSH, Amer. Journ. Sci., ser. 3, XI, 1876, 509. 



Cretaceous (Niobrara); Kansas. 



Hesperornis regalis MARSH. [9.] 



Hesperornis regalis MARSH, Amer. Journ. Sci., ser. 3, III, 1872, 360. 



Cretaceous (Niobrara); Kansas. 



GENUS HAR6ERIA LUCAS. 



Hargeria LUCAS, Proc. U. S. Nat. Mus., XXVI, 1903, 552. Type, by 

 orig. desig., Hesperornis gracilis MARSH. 



Hargeria gracilis (MARSH). [11.] 



Hesperornis gracilis MARSH, Amer. Journ. Sci., ser. 3, XI, 1876, 510. 



Cretaceous (Niobrara); Kansas. 



