360 CHECK-LIST OF NORTH AMERICAN BIRDS. 



4. Graculavus velox MARSH. 



Graculavus velox MARSH, Am. Journ. Sci. III. 1872, 363. 



Greensand of the middle marl bed, or Upper Cretaceous, near Hor- 

 nerstown, New Jersey. 



5. Graculavus pumilus MARSH. 



Graculavus pumilu s MARSH, Am. Journ. Sci. III. 1872, 364. 



Greensand of the middle marl bed, or Upper Cretaceous, near Hor- 

 nerstown, New Jersey. 



G. Hesperornis regalis MARSH. 



Hesperornis regalis MARSH, Am. Journ. Sci. III. 1872, 56. 

 Pteranodon beds of Western Kansas. 



7. Hesperornis crassipes MARSH. 



Lestornis crassipes MARSH, Am. Journ. Sci. XI. 1876, 509. 

 Hesperornis crassipes MARSH, Odontornithes, 1880, 196, figs. 40 a-d, 

 pis. vii, xvii. 



Yellow chalk of the Pteranodon beds, Western Kansas. 



8. Hesperornis gracilis MARSH. 



Hesperornis gracilis MARSH, Am. Journ. Sci. XI. 1876, 510. 

 Yellow chalk of the Pteranodon beds, Western Kansas. 



9. Ichthyornis dispar MARSH. 



Ichthyornis dispar MARSH, Am. Journ. Sci. IV. 1872, 344. 

 Pteranodon beds, Middle Cretaceous, Northwestern Kansas. 



10. Ichthyornis agilis MARSH. 



Graculai'us agilis MARSH, Am. Journ. Sci. V. 1873, 230. 

 Ichthvornis agilis MARSH, Odontornithes, iSSo, 197. 



Ptcranoclon beds, Middle Cretaceous, Western Kansas. 



