SCUTIBRANCHIATA

‖Scu′ti‐bran′chi‐a″ta (?), n. pl. [[NL. See Scutum, and Branchia.]] (Zoöl.) An order of gastropod Mollusca having a heart with two auricles and one ventricle. The shell may be either spiral or shieldlike. ☞ It is now usually regarded as including only the Rhipidoglossa and the Docoglossa. When originally established, it included a heterogenous group of mollusks having shieldlike shells, such as Haliotis, Fissurella, Carinaria, etc.