4 ODONTORNITIIES. 



The fossil birds now known from the Cretaceous deposits of this 

 country are included in nine genera, and twenty species. These have 

 all been described by the writer, and are represented, at present, by the 

 remains of about one hundred and fifty different individuals. This is 

 evidence of a rich and varied avian fauna in America during Mesozoic time, 

 and likewise indicates what we may expect from future discoveries. 



