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STRATI GRAPHICAL DISTRIBUTION OF 



FAMILIES 



LOWER DIVISION. 



GENERA, AND SPECIES. 



Lias. 



Inferior Oolite. 







Great 



Oolite. 



Lower 

 Lias. 



Middle 

 Lias. 



Upper 

 Lias. s 



r 



Murclri- 

 ona; zone. 



Iumphrie- 

 sianus 

 zone. 



'arkinsoni 

 zone. 



Fuller's 

 Earth. 1 



Stonesfield 

 Slate. 



Great 

 Oolite. 



Bradford 

 Clay. 





Heraipedina Bakerise, Wright 

 perforata, Wright . 

 tetragramma, Wright 

 Waterhousei, Wright 

 Bonei, Wright 

 Davidsoni, Wright 

 Woodwardii, Wright 

 microgramma, Wright . 

 Marchamensis, Wright . 

 Corallina, Wright . 

 tuberculosa, Wright 

 Morrisii, Wright . 

 Cunningtoni, Wright 



Pedina rotata, Wright . 

 Smitliii, Forbes 









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Fam. EcHiNiDiE. 

 Glypticus hieroglyphicus, Goldfuss 

 Magnotia Forbesii, Wright . 

 Polvcypbus Normannus, Desor 



Deslongcharapsii, Wright 

 Stomechinus germinans, Phillips . 



intermedius, Agassis 



bigranularis, Lamarck . 



microcypbus, Wright 



gyratus, Agassi: . 



nudus, Wright 









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