CLASSIFICATION AND CORRELATION. 185 



close relationship. The genera are largely the same and many 

 of the species also are either identical or closely allied in the 

 two faunas, and when critical comparisons can be made of the 

 American and European collections several and perhaps many 

 of the American species will probably be shown to be synonyms. 

 From this evidence of the bryozoans the lower Danian or Maes- 

 trichtian age of the Vincentown can be safely assumed, and with 

 this correlation the Danian age of the entire Jerseyian fauna iray 

 be safely implied. 



