The part connecting the
volutes is slightly hollowed, and the channel thus formed is
continued into the volutes. As seen from the side (Fig. 63), the
end of the spiral roll is called a BOLSTER; it has the appearance
of being drawn together by a number of encircling bands. On the
front, the angles formed by the spiral roll are filled by a
conventionalized floral ornament (the so-called PALMETTE). Above
the spiral roll is a low abacus, oblong or square in plan. In Fig.
62 the profile of the abacus is an ovolo on which the egg-and-dart
ornament was painted (cf. Fig. 66, where the ornament is
sculptured). In Fig. 61, as in Fig. 71, the profile is a complex
curve called a CYMA REVERSA, convex above and concave below,
enriched with a sculptured LEAF-AND-DART ornament. [Footnote: The
egg-and-dart is found only on the ovolo, the leaf-and-dart only on
the cyma reversa or the cyma recta (concave above and convex
below) Both ornaments are in origin leaf-patterns one row of
leaves showing their points behind another row.
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