742 



THE CRINOIDEA CAMERATA OF NORTH AlIERICA. 



Geological and Geographical Distribution. 



Number of known species, 

 (Open figures indicate American; those marked (), European). 



FORMATION. 



HEXACEINID.E. 



1 

 d 



American. 



Approximate 



European 



Equivalents. 



1 





P 



S 



o 



5 



1 



o 



i 



CO 



-3 



a 

 o 



1 

 .s 



'a 

 o 



i 



3 



Kaskaskia. 









3 





1 



8 



St. Louis. 







1 



1 



6 





Warsaw. 







5 









Keokuk. 



o 



M 



a 



a 



3 



c 

 o 









5 



1 







Upper Burlington. 







7 









Lower Burlington. 







6 









Kinderhook. 







3 









i 



3 



CD 



Chemung. 







o 











Hamilton. 



Belgium. 



2(3) 



1 











Upper Helderberg. 



Eifel. 



(21) 













Total species .... 85 -^ ^qon 



({do) 



2 

 (24) 



3 



30 

 (9) 



2 



7 



8 



