432 



STRATIGRAPHICAL DISTRIBUTION OF 











LOWER DIVISION. 



FAMILIES, 

 GENERA, AND SPECIES. 











Lias. 



Inferior Oolite. 



Great Oolite. 



Lower 

 Lias. 



Middle 

 Lias. 



Upper 

 Lias. 



Murchi- 

 sonai zone. 



Humpbne- 

 siaaus 

 zone. 



Parkinson! 

 zone. 



Fuller's 

 Earth. 



Stonesfield 



Slate. 



Great 

 Oolite. 



Bradford 

 Clay. 





Fam. ApiockiniDjE. 

























Apiocrinus Parkinson!, Schlotheim . 





















* 





elegans, Befrance . 





















* 





exutus, M^Coy 





















* 





Millericrinus Prattii, Gray 



















* 







obconicus, Goldfuss 















... 





* 







Koninckii, Wright 













... 













ecliinatus, Schlotheim 



























10 



17 



12 







49 







1 



8 



28 



9 







» 







166 Species. 



• 









ECHINOIDEA 



ASTEROIDEA 



OPHIUROIDEA 











CRINOIDEA 





