O. lactea.
O. carnea.
O. triticea.
O. gibbosa.
O. acicularis.
O. volva.
O. volva. The Weaver’s Shuttle. Pl. [34], fig. 4.
Species in which the right edge is not thickened or dentated, and with each extremity elongated, producing a long, straight tube, which increases with age. One of the most rare shells of this genus.
O. oviformis. The egg-shaped Ovula. Pl. [34], fig. 1.
Species ovate, much inflated, ventricose in the centre, very glossy and white; right edge dentated, the tube of each extremity very prominent; interior of aperture reddish purple.