206 



SMITHSONIAN INSTITUTION 



Geological and Geographical Distribution 



Number of known species 



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



Formation 



Sagenocrinidae 



u ■ 



OJ 



C 



o 



American 



Approximate 

 European 

 Equivalents 



3 



a 



u 



a 



o 

 c 



& 



H 



.s 



O 



3 



to 

 3 

 C 

 'C 

 u 

 o 

 e 

 aj 

 be 

 n) 



c/1 



3 

 C 



'u 

 o 

 O 



J3 



J 



3 

 S 



u 

 o 



o 



</) 

 3 

 O 

 u 

 <u 

 *+* 



'S 



O 



|H 



rt 

 U 



►4 















2 



4 



2 

 (I) 



I 



IO 



Keokuk 





Burlington 



/Mountain 

 1 limestone 





c 



S 

 O 

 > 



Q 



















c 

 5 



'u 

 _3 



35 



Niagaran 



Wenlock 



(I) 



(5) 



2 



(I) 



0) 





IO 









II 



(9) 



(I) 



(5) 



2 



(I) 



(I) 



9 

 (i) 





European species 



Total species 



20 



I 



5 



3 



I 



IO 



20 





