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By: Spengel, Johann Wilhelm,Edition:Publication info: Berlin, Verlag von R. Friedländer & Sohn, 1893Volume: no.18:text (1893)Series:Holding Institution: Smithsonian Libraries and ArchivesSubjects: Enteropneusta Hemichordata Naples, Bay of (Italy) ProtochordatesBHL Collections:
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By: Willey, Arthur,Edition:Publication info: New York, Macmillan, 1894Volume:Series:Holding Institution: Cornell University LibrarySubjects: Amphioxus Hemichordata Sea squirtsBHL Collections:
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By: Willey, Arthur,Edition:Publication info: New York, Macmillan, 1894Volume:Series:Holding Institution: MBLWHOI LibrarySubjects: Amphioxus Hemichordata Sea squirtsBHL Collections:
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By: Willey, Arthur,Edition:Publication info: Cambridge, Eng, University Press, 1900?Volume:Series:Holding Institution: Smithsonian Libraries and ArchivesSubjects: Enteropneusta HemichordataBHL Collections: