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Keywords from Image Description:
Origin of Vertebrates Fig . Fig The Endognaths of Limulus pushed out of the way on one side in order to show the position of the Flabellum fl projecting towards the crack between the Prosomatic and Mesosomatic Carapaces The Origin of Vertebrates org Walter Holbrook Gaskell PDoldauto Origin of Vertebrates book Limulus polyphemus