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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