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Keywords from Image Description:
The Quarterly journal of the Geological Society of London . BLAKE AND HITDLESTON ON Cylindrites elongatus Phil Gervillia aviculoides Sow Avicula ovalis Phil Astarte Duboisiana D' Orb Trigonia clavellate form Sowerbya triangularis Phil Gresslya peregrina Phil Myacites recurvus Phil jurassi Brongn Ehynchonella Thurmanni