The Origin of the Primitive Duct Identifier: 10232 Title: The Origin of the Primitive Duct Author: Herbert, V. NealTufts University Date: 1931 Species: AllolobophoraEarthworm BdellostomaHagfish Type: Bulletin, Report Bulletin: Volume 03 - 1931 Report: 16 Citation “The Origin of the Primitive Duct,” MDI Biological Laboratory, accessed March 15, 2026, https://digitalarchive.mdibl.org/items/show/1163.Item 10232 Save this item as a PDF file