A. testâ globosâ, striatâ, olivaceâ, lineis remotis fuscis fasciatâ; spirâ levatâ, apice acuto; aperturâ effusâ intus marginatâ; umbilico magno.
Shell globose, striated, olive, with remote transverse brown lines, spire elevated, the tip acute; aperture wide, within margined; umbilicus large.
The umbilicus of this shell is not so deep as the last, but is larger than in any other known species; the columella is likewise perfect, and the aperture is wider and more oblique than in A. effusa.
