from The Century Dictionary and Cyclopedia
- One of the chief divisions of the Coralligena, in which the fundamental number of the intermesenteric chambers of the body-cavity, and likewise of the tentacles, is six; the hexamerous Coralligena, as distinguished from the Octocoralla, which are octomerous. The common Actiniidæ, or sea-anemones, are an example.
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