branchifera

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.