from the GNU version of the Collaborative International Dictionary of English
- n.pl. An extensive artificial division of gastropod mollusks, including those that breathe by gills, as contrasted with the Pulmonifera.
from The Century Dictionary and Cyclopedia
- In Lamarck's latest classification, a division of gastropods, distinguished from Pneumobranchiata, and containing species which breathe water only. The section imperfectly corresponds to the nudibranchiates, inferobranchiates, and tectibranchiates of Cuvier.
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