Shell small, acute, whitish, with a polished, smooth, trochifonn nucleus of about two and a half whorls and eight or more.subsequent whorls; suture distinct, slightly appressed, anal fasciole slightly constricted; spiral sculpture of sharp narrow grooves, with much wider flat smooth interspaces; (here are about eleven of the grooves on the last whorl between the shoulder and the spirally threaded siphonal fasciole: the anal fasciole is not spirally striate; axial sculpture of (on the last whorl about 10) sharp-edged ribs, with wider interspaces, compressed and arcuate on the anal fasciole, nearly vertical elsewhere and extending over the whole whorl, but not continuous over the spire; incremental lines inconspicuous; aperture rather wide and short with a deep rounded anal sulcus and prominent subsutural callosity: outer lip subvaricose, sharp-edged, smooth within; inner lip with a thick layer of enamel: its outer edge raised with a slight chink between it and the siphonal fasciole; pillar short, straight; canal deep, short, wide, and slightly recurved. Height of shell, 16 mm: of last whorl: 8 mm; diameter: 6 mm. Cat. Nos. 266398, U.S.N.M. (showing nucleus) and 266311, U.S.N.M. (adult shell).

Mexico. Agua Verde Bay. Lower California.