from The Century Dictionary.
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(Fig. 157.) Shell small, acute, rather conical, polished and porcellanous; whirls, about nine; suture, obscure linear.
The olives are shells of great beauty, being highly polished and covered with a porcellanous enamel, the surface of which is marked by spots and bands of a great variety of colors.
-- N.S. (Fig. 158.) Shell subulate, porcellanous; whirls, nine or ten, slightly convex; sutural space rather wide; aperture elongated.
Shell small, white, polished, porcellanous, elongated, whirls numerous, flat; outer lip sharp, but thickened within; pillar lip reflected over the columella.
They are rolled as a scroll, and are covered with a porcellanous enamel.
(68o. 8 Cent.), escaped being rendered porcellanous; * and the protoplasm in the cells close beneath these glands underwent some slight, though imperfect, degree of aggregation.