i6o CRETACEOUS PALEONTOEOGY. 



The Gryphaea associated with Terebrahda harlani in this shell 

 bed is a form similar to the earlier representives of the genus 

 in the Cretaceous formations of the state, and doubtless was 

 genetically related to them, although it has certain characters 

 which seem to be constantly different from any of the lower 

 forms and has been described in this report as a distinct species. 



