FOSSIL BIRDS. 337 



13. Ichthyornis agilis Marsh. 



Graculavus agilis Marsh, Am. Journ. Sci. V. 1873, 230. 

 Ichthyornis agilis Marsh, Odontornithes, 1880, 197. 



Pteranodon beds, Middle Cretaceous, western Kansas. 



14. Ichthyornis anceps Marsh. 



Graculavus anceps Marsh, Am. Journ. Sci. III. 1872, 364. 

 Ichthyornis anceps yiPLRSB., Odontornithes, 1880, 198. 



Gray shale of the Middle Cretaceous, Smoky Hill River, western 

 Kansas. 



15. Ichthyornis lentus Marsh. 



Graculavus lentus Marsh, Am. Journ. Sci. XIV. 1877, 253. 

 Ichthyornis lentus Marsh, Odontornithes, 1880, 198. 



Middle Cretaceous beds, near Fort McKinney, Texas. 



16. Ichthyornis tener Marsh. 



Ichthyornis tener Marsb., Odontornithes, 1880, 198, pi. xxx. fig. 8. 

 Pteranodon beds. Middle Cretaceous, Wallace County, Kansas. 



17. Ichthyornis validus Marsh. 



Ichthyornis validus Marsh, Odontornithes, 1880, 198, pi. xxx. 

 figs. 11-14. 



Yellow 'chalk of the Middle Cretaceous, near Solomon River, 

 northwestern Kansas. 



18. Ichthyornis victor Marsh. 



Ichthyornis victor Marsh, Am. Journ, Sci. XI. 1876, 511. 

 Middle Cretaceous of Kansas, in various localities. 



19. Laornis edvardsianus Marsh. 



Laornis edvardsianus Marsh, Pr. Ac. Nat. Sci. Phila. 1870, 5. 



Middle marl bed. Upper Cretaceous, Birmingham, New Jersey. 



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