Bulletin - United States National Museum - Smithsonian Institution

154 BULLETIN 91, UNITED STATES NATIONAL MUSEUM.
six in all. Aperture subcircular, outer lip thin, showing the external
sculpture within, somewhat wavy at the edge; columella short, stout,
strongly curved; parietal wall covered with a thin callus.
There are two cotypes, Cat. No. 221, U.S.N.M., collected by Wil-
liam Stimpson on the North Pacific Exploring Expedition at False
Bay, Cape of Good Hope. The larger of them, the specimen figured,
has four postnuclear whorls, and measures : Altitude, 7.2 mm. greater
;
diameter, 8.5 mm.; lesser diameter, 7.5 mm. Cat. No. 101, U.S.N.M.,
contains one specimen also collected by William Stimpson at the
Cape of Good Hope. Cat. No. 901 08&, U.S.N.M., one specimen from
the Cape of Good Hope.
GIBBULA FULGENS Gould.
Plate 26, figs. 4, 5, 6.
Gibbulafulgens Gould, Proc. Bost. Soc. Nat. Hist., vol. 8, p. 21, 1861.
Shell helicoid with rather elevated spire, light brown with blotches
of dark brown and yellowish-white, these usually on and near the
spiral cords, a pearly luster shining through the thin epidermis, par-
ticularly in the lighter areas. Nuclear whorls two and one-half,
well rounded, smooth, white. Postnuclear whorls ornamented by
spiral cords of which three strong ones and two slender ones occur
between the summit and the periphery on the first two whorls. The
first strong cord is at the summit, the second, half way between the
first and third, while the third is as far posterior to the suture as the
second is removed from the first. The stronger of the two fine cords
is half way between the first and second strong cords and the lesser,
half way between this and the one at the summit. On the last turn
a third slender cord occurs between the first and second strong cords,
dividing the space between the medium slender cord and the second
strong cord into equal portions; another slender cord divides the
space between the second and third strong cords medially. Sutures
strongly impressed. Periphery of the last whorl angulated. Base
well rounded, narrowly umbilicated, marked by 10 strong spiral
cords, which are almost equal and equally spaced, becoming succes-
sively only a trifle less strong and more approximated to each other
from the periphery toward the umbilicus. Aperture subcircular,
very oblique; outer lip thin at the edge, thick within; columella
strong, decidedly curved; parietal wall covered with a thin callus.
The type, Cat. No. 2046, U.S.N.M., was collected by William
Stimpson on the North Pacific Exploring Expedition at the Cape of
Good Hope; it has three and one-fourth postnuclear whorls, and
measures: Altitude, 8 mm.; greater diameter, 7.5 mm.; lesser diameter,
7 mm.