376 CHECK-LIST OF NORTH AMERICAN BIRDS. 



Ichthyomis agilis (MARSH). [13.] 



Graculavus agilis MARSH, Amer. Journ. Sci., ser. 3, V, 1873, 230. 



Cretaceous (Niobrara); Kansas. 



Ichthyomis anceps (MARSH). [14.] 



Graculavus anceps MARSH, Amer. Journ. Sci., ser. 3, III, 1872, 364. 



Cretaceous (Niobrara); Kansas. 



Ichthyomis dispar MARSH. [12.] 



Ichthyomis dispar MARSH, Amer. Journ. Sci., ser. 3, IV, 1872, 344. 



Cretaceous (Niobrara); Kansas. 



Ichthyomis lentus (MARSH). [15.] 



Graculavus lentus MARSH, Amer. Journ. Sci., ser. 3, XIV, 1877, 253. 



Cretaceous; Texas. 



Ichthyomis te"ner MARSH. [16.] 



Ichthyomis tener MARSH, Odontornithes, 1880, 198, pi. xxx, fig. 8. 



Cretaceous (Niobrara); Kansas. 



Ichthyomis validus MARSH. [17.] 



Ichthyomis validus MARSH, Odontornithes, 1880, 198, pi. xxx, figs. 11-14. 



Cretaceous (Niobrara); Kansas. 



Ichthyomis victor MARSH. [18.] 



Ichthyomis victor MARSH, Amer. Journ. Sci., ser. 3, XI, 1876, 511. 



Cretaceous (Niobrara); Kansas. 



FAMILY APATORNITHID^!. 

 GENUS APATORNIS MARSH. 



Apatomis MARSH, Amer. Journ. Sci., ser. 3, V, Jan. 21, 1873, 162. Type, 

 by monotypy, Ichthyomis celer MARSH. 



