Inhab. Mus. Brit.
Shell rather depressed, conical, purple variegated with white, generally concentrically wrinkled, and ornamented with granulated spiral ribs, the ribs of the upper part of the last, and of all the other whorls rather distant, and forming four series; those of the under part rather closer, and smaller. The axis unbilicated, smooth, the aperture roundish, the outer lips furrowed, the columella lip smooth with a groove at its base, axis four-twelfths, diameter five-twelfths of an inch.
30. Monodonta denticulata (n.s.)
Testa depresso-conica, umbilicata, rufa, nigro punctata, spiraliter sulcata, subgranulata, umbilico extus crenato.
Inhab. -- Mus. Brit.
Shell depressed, conical, pale reddish, ornamented with rows of white and brown spots, spirally grooved, ribs slightly granulated; the sutures distinct, impressed, the lower part of the last whorl nearly smooth, the umbilicus white, smooth inside, the edge furnished with a series of granules. The mouth subquadrangular, outer lip crenulated at the edge, the columella lip smooth, with a large tooth at the inside, and a little roughness on the outer side; axis three-tenths, diameter five-twelfths of an inch.
31. Monodonta constricta, Lam. Hist. 7 36.
32. Monodonta rudis (n.s.)
Testa ovato-conica imperforata ulbido-purpurea rudis crassa, labro duplicato, extus albido viridi, intus subsulcato, albo.
Inhab. -- Mus. Brit.
Shell ovate, conical, imperfurated, rough, pearly, concentrically striated, whitish-brown; when worn or where eroded, purple; the whorls convex, suture distinct, sometimes occupying an impressed line on the lower whorl; the base rather convex, the aperture roundish, the axis (imperforate) covered with a white callus, which leaves a slight concavity over its end; the outer lip of three colours, the outer part purple or green and white, the middle pearly, and the inner opaque, white, and furrowed; the surface of the lower part of the last whorl is frequently worn away just opposite the mouth, so as to leave a purple spot.