THE 
FOSSIL BIRDS OF NORTH AMERICA. 
SuBcLASS SAURURA. 
OrDER ORNITHOPAPPI. 
Famity ARCHAOPTERYGIDS. 
GENUS LAOPTERYX Manrsu. 
Laopteryx Marsu, Amer. Journ. Sci., ser. 3, XXI, April, 1881, 341. 
Type, by monotypy, Laopteryx priscus MarsH. 
Laépteryx priscus Marsu. [1.] 
Laopteryx priscus MarsH, Amer. Journ. Sci., ser. 3, XXI, 1881, 341- 
Jurassic; Wyoming. 
SupcLass ORNITHU RA. 
SUPERORDER ODONTORM. 
OrpEeR PTHEROPAPPI. 
Fammy ICHTHYORNITHIDE. 
GeNus ICHTHYORNIS Marsa. 
Ichthyornis Marsu, Amer. Journ. Sci., ser. 3, IV, Nov., 1872, 344. 
Type, 
by monotypy, Jchthyornis dispar Mars. 
