« Shell small, dull, slender, yellowish white, eight-whorled; nucleus small, translucent, shining, passing into the sculpture of the adult gradually, in two and a half nuclear whorls, which show first minute transverse wrinkles on the periphery of the second whorl; succeeding whorls transversely sculptured by eight to twelve slightly oblique angular riblets, which pass entirely over the whorls, and only become obsolete on the canal ; these are crossed, first by (on the upper whorls) two or (on the last whorl) nine rounded threads which rise to sharp points on reaching the summits of the riblets, and are perfectly distinct in the interspaces; secondly, by finer intercalary revolving threads, which pass without change over the riblets, usually to the number of three or four between each pair of primary threads… » – W. H. Dall: “Reports on the results of dredging, under the supervision of Alexander Agassiz, in the Gulf of Mexico, and in the Caribbean Sea, 1877-79, by the United States Coast Survey steamer ‘Blake’, Lieutenant-Commander C. D. Sigsbee, U.S.N., and Commander J. R. Bartlett, U.S.N., Commanding. XV. Preliminary report on the Mollusca”, Bulletin of the Museum of Comparative Zoology at Harvard College vol. 9(2), Cambridge (MA) 1881, p.65-66.

« …these also cover the notch-band, and over them, as well as the primaries, the lines of growth are raised in microscopic granules, or lamellae, which, under strong magnification, give a very peculiar scabrous appearance to the surface; the strongest primary riblet is the one just in advance of the somewhat steeply declining and poorly defined notch-band; aperture narrow, notch deep, outer lip thin, produced, probably thickened in the perfectly mature adult; columella and body whorl without callus; pillar straight; suture appressed; canal slightly recurved. » – Ibid.