TRIASSIC JURAS 



CAMPYLOSEPIA^ 



(AULACOCEBAS_ 

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CEOTEUTJ, 



^s;i':PHALOPODA 



AMMO N ITEJ 



9C<»«URt 



CftROlUM 

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LIMOPSIS ) 



MYTILUS ; PERNA 



BL/LLINEXLA 



VENERIDp 

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TRICONI 



LECYPODA 



ARCA 



CAPHOPODA 



auricula! 



[PLANORBIi 

 LIMN/EA; 



ASTROPODA 



.MPHINEURA 



