402 CHECK-LIST OF NORTH AMERICAN BIRDS. 



Class AVES. Birds. 



Subclass NEORNITHES. Typical Birds. 



SuPERORDER ODONTOGNATHAE. New World 

 Toothed Birds. 



Order HESPERORNITHIFORMES. 



Hesperornithes. 



Family HESPERORNITHIDAE. Hesperornithes. 



Genus HESPERORNIS Marsh. 



Hespcrornis Marsh, Amer. Journ. Sci., ser. 3, III, 1S72, 360. Type, by 

 monotypy, Hcspcrornis rcgalis Marsh. 



Hesperornis crassipes (Marsh). 



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

 Cretaceous (Niobrara) : Western Kansas. 



Hesperornis montana Shufejldt. 



Hesperornis montana Shufeldt, Auk, XXXII, No. 3, July, 1915, 293, pi. 

 18, figs. 4, 6, 8, 10, 12. 



Cretaceous (Claggett Formation): one mile above mouth of Dog Creek, 

 Fergus County, Montana. 



Hesperornis regalis Marsh. 



Hesperornis regalis Marsh, Amer. Journ. Sci., ser. 3, III, 1872, 357. 

 Cretaceous (Niobrara); Smoky Hill River, near Wallace, Kansas. 



Genus CONIORNIS Marsh.i 



Coniornis Marsh, Amer. Journ. Sci., ser. 3, XLV, 1893, 82. Type, by 

 monotypy, Coniornis altus Marsh. 



Coniornis altus Marsh. 



Coniornis altus Marsh, Amer. Journ. Sci., ser. 3, XLV, 1893, 82 (text fig.) . 



Cretaceous (Claggett) : Judith River, Montana. 



1 Shufeldt, Trans. Conn. Acad. Arts Sci., XIX, Feb., 1915, 16, 75, considers 

 this a synonym of Hesperornis. 



