Shell small, subcylindrical, blunt-tipped, polished; yellow, brown, salmon-colored, bluish gray, or streaked or banded with these colors; seven whorled; apex flattish; nucleus not differentiated, small; whorls, after the second, nearly equal in diameter; suture much appressed, the whorl somewhat constricted in front of it; sculpture only of faint incremental lines; base rounded; aperture rounded ovate, slightly oblique: outer lip continuous with the pillar, which is raised, arched in harmony with the lip, but not reflected; no umbilicus; lip simple, hardly thickened ; a little callus on the body and in the posterior angle between the lip and body; throat simple, very slightly pearly; operculum circular, externally shaggy, with many whorls; animal with long slender tentacles; the eyes black, on separate rather long peduncles; epipodial line indicated by four or six short stout papilla1; foot short and broad; muzzle rather large and long, a little indented in the middle line; median and admedian teeth simple, with narrow straight stems, and simple, wide, mushroomlike cusps; uncini numerous, filiform ; admedian teeth four, the outer ones the larger; stems and bases of the middle part of the radula so small and thin as to be difficult to distinguish; maximum longitude of shell, 5.8; maximum latitude, 1.9; longitude of aperture, 1.2mm.

This singular little shell appears to be the only representative on the shores of America of the Australasian Bankivia. The tentacles did not appear ciliated, nor could I observe any cephalic lappets between them. The difficulties of observation, however, are so great with so minute an object that their absence can not be dogmatically affirmed merely from an examination of alcoholic specimens.

Brazil. Off Rio Janeiro, in 59 fathoms, mud; and off the Rio de la Plata.