THE 



FOSSIL BIEDS OF NOETH AMEEICA. 



Subclass SAUEURiE. 

 Oeder ORNITHOPAPPI. 



Family ARCHiEOPTERYGIDiE. 



Genus LAOFTERYX Maesh. 



Laopteryx Marsh, Amer. Journ. Sci., ser. 3, XXI, April, 1881, 341. 

 Type, by monotypy, Laopteryx priscus Marsh. 



La6pteiyx priscus Marsh. [1.] 



Laopteryx priscus Marsh, Amer. Joum. Sci., ser. 3, XXI, 1881, 341- 

 Jurassic; Wyoming. 



Subclass ORNITHURtE. 



SUPERORDEH ODONTORM^. 

 Order PTEROPAPPI. 



Family ICHTHYORNITHIDiSB. 



Genus ICHTHYORNIS Marsh. 



Ichthym-nis Marsh, Amer. Joum. Sci., ser. 3, IV, Nov., 1872, 344. Type, 

 by monotypy, Ichthyornis dispar Marsh. 



