Shell proportionally very small, extremely thin, pellucid, almost
membranous, oval or sub-globular; spire very short, of which the last
whorl is very large; aperture large, semilunar; the edges sharp; the
left edge arched, and extending itself interiorly to the summit.
_V. pellucida._ The pellucid Vitrina. Pl. 17, fig. 3.
Extremely thin, pellucid, and glossy; depressed, spire very short;
aperture large and oval; colour pale yellowish green.
FAMILY VII.
COLIMACEA. Eleven genera.