26 GIRTY 



The Guadalupian faunas are not only widely different from 

 those of Pennsylvanian age in the Mississippi Valley, but they 

 appear to have a distinctly younger facies, biologically con- 

 sidered. So far as the significance of the somewhat hastily 

 reviewed evidence has been grasped, it seems to assign the 

 Kansas faunas to about the horizon of the Hueco formation, 

 placing the entire Guadalupian series, or at all events the 

 Capitan, as a younger evolution, whether the 2 faunas were 

 developed in distinct provinces or in the same. 



