basommatophora

from The Century Dictionary.

• A division of pulmonale gastropodous mollusks, including those which have the eyes at the base of the tentacles, as in the families Auriculidæ, Limnæidæ, etc.: opposed to Stylommatophora. See cut under Limnæidæ.

from the GNU version of the Collaborative International Dictionary of English.

• noun plural (Zoöl.) A group of Pulmonifera having the eyes at the base of the tentacles, including the common pond snails.