scutibranchiata

from The Century Dictionary.

• noun In De Blainville's classification (1825), the second order of his Paracephalophora hermaphrodita, divided into the two families Otidea and Calyptracea, or the ear-shells and various limpet-like shells. See cuts under abalone and sea-ear.

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

• noun plural (Zoöl.) An order of gastropod Mollusca having a heart with two auricles and one ventricle. The shell may be either spiral or shieldlike.