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Keywords from Image Description:
Radiolaria Challenger Plate . follows Plate Tripocyrtida Anthocyrtida et Sethocyrtida Diam Fig Lithomelissa btschlii sp vel Sethomelissa btschlii Fig Lithomelissa decacantha sp vel Sethomelissa decacantha Fig Psilomelissa calvata sp The cephalis alone with the three collar beams Fig Lychnodictyum scaphopodium sp Fig