XIII 



i'llVLLM CIIOUDATA 



413 



Order 1. — Stkheornithes.^ 



TiiclmlinL; Phororhaeos, Dryornis, and other genera from the 

 Eocene of South America. 



Fic. 1053.— Hesperornis regalis. The restored skeleton. (After Marsh.) 



Order 2. — Odontolc.e. 



Including Heqjcivrnis^ (^^g- 1053), a large diving and swimming 

 Bird from the Cretaceous of North America, and other less known 

 genera. 



1 Recent investigations indicate that tliis is not a natural grovip, but that its 

 various genera will have to be distributed amongst various orders both of 

 Ratita^ and of Carinata'. 



^ HtaptrornU is perhaps more nearly related to the Ratitie. 



