FOSSIL BIRDS. 377 



Apatdmis c61er (Maesh). [2.] 



Ichthyornis ceUr Marsh, Amer. Joum. Sci., ser. 3, V, 1873, 74. 



Cretaceous (Niobrara); Kansas. 



SUPERORDER ODONTOLC^. 

 Order DROMiEOPAPPI. 

 Family HESPERORNITHID^. 



Genus HESPERORNIS Mabsh. 



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

 monotypy, Hesperornis regalis Maksh. 



Hesperdmis crSssipes (Marsh). [10.] 



Lesiornis crassipes Marsh, Amer. Joum. 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 HARGERIA Lucas. 



Hargeria Lucas, Proc. TJ. S. Nat. Mus., XXVI, 1903, 552. Type, by 

 orig. desig., Hesperornis gracilis Maksh. 



Hargeria gracilis (Marsh). [11.] 



Hesperornis gracilis Maesh, Amer. Joum. Sci., ser. 3, XI, 1876, 510. 



Cretaceous (Niobrara); Kansas. 



