ClipArt ETC
"In this family the arms appear to be merely prolongations of the disc; they are suaully five in number, and the plates from which the ambulacra are exserted are placed in deep furrows, which run along the lower surface of the arms." — Goodrich, 1859

Five-fingered jack

"In this family the arms appear to be merely prolongations of the disc; they are suaully five in number,…