OF NORTH AMERICA. 



83 



Geological Distribution 

 AMERICAN FOSSIL LYMN^EAS 

 tomanchean Oligocene 

 Cretaceous "f Middle Miocene 



Lower Eocene -^Lower Pliocene 

 OMiddle Eocene Clipper Eocene 



FIG. 8. 

 Map showing distribution of American Fossil Lymnseas. 



