336 CHECK-LIST OF NORTH AMERICAN BIRDS. 



6. Coniornis altus MARSH. 



Coniornis altus MARSH, Am. Journ. Sci. XLV. 1893, 82. 

 Cretaceous of Montana, near mouth of Judith River. 



7. Gractilavus velox MARSH. 



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



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

 Hornerstown, New Jersey. 



8. Graculavus pumilus MARSH. 



Graculavus pumilus MARSH, Am. Journ. Sci. III. 1872, 364. 



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

 Hornerstown, New Jersey. 



9. Hesperornis regalis MARSH. 



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

 Pteranodon beds of western Kansas. 



10. Hesperornis crassipes MARSH. 



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

 Hesperornis crassipes MARSH, Odontornithes, 1880, 196, figs. 

 40 ad, pis. vii, xvii. 



Yellow chalk of the Pteranodon beds, western Kansas. 



11. Hesperornis gracilis MARSH. 



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

 Yellow chalk of the Pteranodon beds, western Kansas. 



12. Ichthyornis dispar MARSH. 



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

 Pteranodon beds, Middle Cretaceous, northwestern Kansas. 



