PEASE'S DESCRIPTION : " Shell ovate, thin, fragile, white, with or without one or two sets of two or three fine transverse black lines on bod)' whorl, transversely finely grooved ; interstices punctured ; spire obtuse ; apex acute ; whorls four ; aperture oval, dilated at the base ; slight fold at the base of the columella (not imperforate, umbilicated)."
LECTOTYPE (here selected) : B.M.(N.H-) Reg. No. 1961456. Length, 11 mm. ; diameter, 7 mm. Paralectotype (1961457) : length, 11 mm. ; diameter, 7 mm.
REMARKS : The entire shell is marked by regularly spaced spiral grooves which are closely punctate, the punctations showing through the transparent shell in the aperture like links of a chain. The columella is straight and vertical, lacking folds and plaits, and ending abruptly on the outer Hp. The protoconch is small, convex, and smooth. Beachworn specimens of this species although resembling Bullina lauta Pease below are distinguished by their thin, almost transparent shells, distinctly punctate grooves, and their straight columella.
Both living and beached specimens are rare in the Hawaiian Islands. A single living animal was recently collected at Ala Moana Beach Park, Oahu [H.I.], where it was found partially buried in a shallow, sandy depression at the low tide level.