Shell smooth, thick-walled, urceolate, with obliterated collar stricture.
Shell smooth, urceolate, with very delicate and elegant network.
Shell smooth, urceolate with regular, circular pores of equal size, of about the same breadth as the bars.
Shell broad, urceolate, smooth, with sharp collar stricture.
Shell annulate, thick-walled, urceolate, with slight collar stricture.
Shell smooth, urceolate or ovate, with three sharp strictures.
Calyx urceolate, 3–5-toothed, becoming enlarged and saccate, contracted at the apex and enclosing the fruit.
