The Origin of the Primitive Duct Identifier: 10232 Title: The Origin of the Primitive Duct Author: Herbert V. Neal, Tufts University Date: 1931 Species: Allolobophora Bdellostoma Common Name: Earth worm Hagfish Type: Bulletin, Report Bulletin: Volume 03 - 1931 Report: 16 Citation “The Origin of the Primitive Duct,” MDI Biological Laboratory, accessed September 23, 2025, https://digitalarchive.mdibl.org/items/show/1163.Item 10232 Save this item as a PDF file