FOSSIL BIRDS. a Vivi 
Apatérnis céler (Marsn). [2.] 
Ichthyornis celer Marsu, Amer. Journ. Sci., ser. 3, V, 1873, 74. 
Cretaceous (Niobrara); Kansas. 
SUPERORDER ODONTOLC. 
OrDER DROM/ZOPAPPI. 
Famity HESPERORNITHIDZ. 
GENUS HESPERORNIS Marsu. 
Hesperornis Marsu, Amer. Journ. Sci., ser. 3, III, 1872, 360. Type, by 
monotypy, Hesperornis regalis MARsH. 
Hesperornis crassipes (MarsH). [10.] 
Lestornis crassipes MarsH, Amer. Journ. Sci., ser. 3, XI, 1876, 509. 
Cretaceous (Niobrara); Kansas. 
Hesperornis regélis Marsu. [9.] 
Hesperornis regalis MarsH, Amer. Journ. Sci., ser. 3, III, 1872, 360. 
Cretaceous (Niobrara); Kansas. 
GENUS HARGERIA Lucas. 
Hargeria Lucas, Proc. U. 8. Nat. Mus., XXVI, 1903, 552. Type, by 
orig. desig., Hesperornis gracilis MarsH. 
Hargéria gracilis (Mars). [11.] 
Hesperornis gracilis MarsH, Amer. Journ. Sci., ser. 3, XI, 1876, 510. 
Cretaceous (Niobrara); Kansas. 
