The Nautilus. Vol. XXXI, No. 2, October 1917 / A Quarterly Journal Devoted to the Interests of Conchologists

by Various

Polygyra cereolus volvoxis (Pfr.).

Polygyra cereolus carpenteriana (Bld.).

Pupoides modicus (Pfr.).

Helicina orbiculata Say.

Eau Gallie.

Polygyra cereolus septemvolva Say.

Polygyra cereolus volvoxis (Pfr.).

Polygyra uvulifera (Shutt.).

Physa cubensis Pfr.

Helicina orbiculata Say var.