xm 



PHYLUM CHORDATA 

 ORDER 1. STEREORNITHES. 1 



401 



Including Phororhacos, Dryornis, and other genera from the 

 Eocene of South America. 



V-*-^** 1 - ' -*\-^- ft.-*-\ ,,^^-i^''-^ y . ijf*^-^- 



t1S^>:^^^%^r : ^ 



*--(.,- .,': ''WWi-*-"., ^^..J^^^^^T^^ 



FIG. 1005. Ichthyornis victor. The restored skeleton. (After Marsh.) 



ORDER 2. ODONTOLOE. 



Including Hesperornis 2 (Fig. 1064), a large diving and swimming 

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

 genera. 



1 Recent investigations indicate that this is not a natural group, bxit that 

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

 Ratitse and of Carinatse. 



2 Hesperornis is perhaps more nearly related to the Ratitae. 



