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Keywords from Image Description:
Radiolaria Challenger Plate . follows Plate Cubosphrida Diam Fig Hexacontium sceptrum sp Fig The two medullary shells Fig Hexacontium favosum sp Fig The two medullary shells Fig Hexacontium axotrias sp The six latticeplates which form the cortical shell are not yet fully developed Fig Hexacontium floridum sp Fig The