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from The Century Dictionary and Cyclopedia

  • An order of worms destitute of an alimentary canal.
  • A suborder of Rhabdocœlida in which the cavity of the enteron is obliterated by the concrescence of its walls, the mouth leading through a simple pharynx directly into the digestive syncetium. It contains the families Porporidæ and Aphanostomidæ.


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