%scyllaea%

‖n. [ NL. See Scylla. ] (Zool.) A genus of oceanic nudibranchiate mollusks having the small branched gills situated on the upper side of four fleshy lateral lobes, and on the median caudal crest. [ 1913 Webster ]

☞ In color and form these mollusks closely imitate the fronds of sargassum and other floating seaweeds among which they live. [ 1913 Webster ]