THE 



FOSSIL BIRDS OF NORTH AMERICA. 



A. -JURASSIC. 



1. Laopteryx priscus MARSH. 



Laopteryx priscus. MARSH, Am. Journ. Sci. XXI. 1881, 341. 

 Upper Jurassic beds of Wyoming. 



B. - CRETACEOUS. 1 



2. Apatornis celer MARSH. 



Ichthyornis celer MARSH, Am. Journ. Sci. V. 1873, 74- 

 Apatornis celer MARSH, Am. Journ. Sci. V. 1873, 162. 



Middle Cretaceous of Western Kansas. 



3. Baptornis advenus MARSH. 



Baptornis advenus MARSH, Am. Journ. Sci. XIV. 1877, 86. 



Cretaceous of Western Kansas, in the same beds with Odontornithes 

 and Pteranodontia. 



1 The genera alphabetically arranged. 



