Shell height 4.7 mm (1). Teleoconch of eight whorls (2). Protoconch of four smooth whorls  (3). Body whorl 40% of shell height (4). Elliptical aperture, 24% of shell height (5). Whorl profile flattish (6), but sutures in deep furrows (7). Short siphonal canal (8) visible as a rounded notch abapically (9). Base of body-whorl has smooth, dark spiral band (10) and two inconspicuous whitish spiral riblets (11). Menai Strait, Wales, March 2012.