PHYLUM CH(_)RDATA 



413 



Okdeu 1 . — Steiieounithes.^ 



lucluilinL;- PJwrorhacos, Bri/oiiiis, and otlier genera from the 

 Eocene of South America. 



Fic. 1053.— HesperorniB regalis. The restored skeleton. (After Mar.sli.) 



Order 2. — Odontolc.e. 



Including Hespcrornis - (Fig. 1053), a large diving and sAvimming 

 Bird from the Cretaceous of North America, and other ]css known 

 genera. 



' Recent investigations imlicatc that tliis is not a natiual group, l)ut that its 

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

 Ratitfe and of Oarinatie. 



■^ Hesptrornh is perliaps more nearly related to the Ratitie. 



