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The Crinoidea flexibilia . Springer Cp imoidea Flexibilia Plate LX'I Chapmandel HeliotjpcCo Plate LXVII Illustration biodiversitylibrary org title Springer Frank Biodiversity Heritage Library The Crinoidea flexibilia with an atlas of and plates Crinoidea Fossil Harvard University MCZ Ernst Mayr Library bhl page dc identifier