"Shell imperforate, oblong, yellowish; spire elongated, with an elevated line near the suture; base grooved. A single specimen of this exceedingly rare shell exists in the Tankerville collection; from which the above specific character was hastily noted down, while inspecting that magnificent cabinet last year. In size and proportions it perfectly resembles the Ancillaria glabrata (Buccinum glabratum, Lin.) yet, like the next species, has not the least vestige of an umbilicus. It is clearly distinguished from A. rubiginosa by the elevated line which follows the suture. We may expect the imperfections of this description to be soon supplied by Mr. G. Sowerby, in the catalogue of this noble collection, now preparing for publication.". Recent. No locality given.