422 



STRATIGRAPHICAL DISTRIBUTION OF 





LOWER DIVISION. 



FAMILIES 

 GENERA, AND SPECIES. 





Lias. 



Inferior Oolite. 



Great Oolite. 





lower 

 Lias. 



Middle 

 Lias. 



Upper 

 Lias. 



Miirchi- 

 lOUEe zone. 



Humphrie- 

 sianus 

 zone. 



Parkinsoni 

 zone. 



FuUer's 

 Earth. 



Stonesfield 

 Slate. 



Great 

 Oolite. 



Bradford 

 Clay. 





Hemipedina Bakeriae, Wright 









* 













.. . 





perforata, Wright . 









* 

















tetragrarama, Wright 









* 

















Waterhousei, Wright 









* 

















Bonei, Wright 









* 

















Davidsoni, Wright 



















* 







Woodwardii, Wright 

























microgramma, Wright . 

























Marchamensis, Wright . 

























Corallina, Wright . 

























tuberculosa, Wright 

























Morrisii, Wright . 

























Cunningtoni, Wright 



• ... 























Pedina rotata, Wright . 













* 













Smitbii, Forbes 













* 







* 







Fam. EchiniDjE. 

























Glypticus hieroglyphicus, Goldfuss 

























Magnotia Forbesii, Wright . 













:i: 













Polycypbus Normannus, Desor 













* 





* 



* 







Deslongcbampsii, Wright 









* 

















Stomecbinus germinans, Phillips . 









* 

















interraedius, Agatsiz 











* 



* 













bigranularis, Lamarck . 













* 













microcypbns, Wright 



















* 







gyratus,. Agassis . 

























nudus, Wright 

















" 









