FOSSIL BIRDS. 337 
13. Ichthyornis agilis Marsu. 
Graculavus agilis Marsu, Am. Journ. Sci. V. 1873, 230. 
Ichthyornis agilis Marsu, Odontornithes, 1880, 197. 
Pteranodon beds, Middle Cretaceous, western Kansas. 
14. Ichthyornis anceps Marsu. 
Graculavus anceps Marsu, Am. Journ. Sci. III. 1872, 364. 
Ichthyornis anceps Marsu, Odontornithes, 1880, 198. 
Gray shale of the Middle Cretaceous, Smoky Hill River, western 
Kansas. 
15. Ichthyornis lentus Marsu. 
Graculavus lentus Marsu, Am. Journ. Sci. XIV. 1877, 253. 
Ichthyornis lentus Marsu, Odontornithes, 1880, 198. 
Middle Cretaceous beds, near Fort McKinney, Texas. 
16. Ichthyornis tener Marsu. 
Lchthyornis tener Marsu, Odontornithes, 1880, 198, pl. xxx. fig. 8. 
Pteranodon beds, Middle Cretaceous, Wallace County, Kansas. 
17. Ichthyornis validus Marsu. 
Lchthyornis validus Marsu, Odontornithes, 1880, 198, pl. xxx. 
figs. 11-14. 
Yellow chalk of the Middle Cretaceous, near Solomon River, 
northwestern Kansas. 
18. Ichthyornis victor Marsu. 
Lchthyornis victor Marsu, Am. Journ, Sci. XI. 1876, srr. 
Middle Cretaceous of Kansas, in various localities. 
19. Laornis edvardsianus Marsu. 
Laornis edvardsianus Marsu, Pr. Ac. Nat. Sci. Phila. 1870, s. 
Middle marl bed, Upper Cretaceous, Birmingham, New Jersey. 
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