THE 



FOSSIL BIEDS OF NOETH AMEEICA. 



SUBCLASS SAURURJE. 

 ORDER ORNITHOPAPPI. 



FAMILY ARCHJEOPTERYGIDJE. 



GENUS LAOPTERYX MARSH. 



Laopteryx MARSH, Amer. Journ. Soi., ser. 3, XXI, April, 1881, 341. 

 Type, by monotypy, Laopteryx prisons MARSH. 



Laopteryx prisons MARSH. [1.] 



Laopteryx prisons MARSH, Amer. Journ. Sci., ser. 3, XXI, 1881, 341- 

 Jurassic; Wyoming. 



SUBCLASS ORNITHUR.E. 



SUPERORDER ODONTORM^B. 



ORDER PTEROPAPPI. 



FAMILY ICHTHYORNITHID-ffi. 

 GENUS ICHTHYORNIS MARSH. 



Ichthyornis MARSH, Amer. Journ. Sci., ser. 3, IV, Nov., 1872, 344. Type, 

 by monotypy, Ichthyornis dispar MARSH. 



