216 University of Kansas Geological Survey. 



The frontispiece, from a painting by Mr. J. Carter Beard, the 

 well-known artist, has been for the most part based upon the 

 restorations of the present volume, and others published else- 

 where by myself. It is, I believe, as nearly correct as it is 

 possible for such an ideal representation of extinct animals to 

 be. The Petrodactyls and Plesiosaurs, not treated in the pres- 

 ent volume, will be fully described and figured in the next one 

 of this series, I trust. It is not at all probable that the sauri- 

 ans were often upon land, as they are represented, though pos- 

 sible. 



