from The Century Dictionary.
- In zoology: Same as Branchiogasteropoda; a division of Gasteropoda including those which breathe by gills: opposed to Pulmonifera.
- (b In De Blainville's system of classification, a division of univalves, of the order Cervicobranchiata, equivalent to the family Fissurellidæ; the keyhole limpets.
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