Bulletin - United States National Museum - Smithsonian Institution

158 BULLETIN 91, UNITED STATES NATIONAL MUSEUM.
Base moderately long, well rounded, and openly, broadly umbilicated,
marked by 13 subequal and subequally spaced spiral threads which
are wider than the spaces that separate them. In addition to the
spiral cords, the base is marked by the continuation of the lines of
growth. Inside of umbilicus smooth. Aperture large, subquadrate;
outer and basal lips thin, forming a decided angle at their junction;
inner lips oblique, smooth, sinuous; parietal wall glazed with a thin
callus.
The type and two specimens of the species, Cat. No. 90108a,
U.S.N.M., come from the Cape of Good Hope. The type has three
and one-fourth postnuclear whorls, and measures: Altitude, 7 mm.;
greater diameter, 8 mm.
GIBBULA MULTICOLOR Krauss.
Cat. No. 186874, U.S.N.M., three specimens from Port Alfred
(Coll. No. 244). Cat. No. 250508, U.S.N.M., one specimen from Port
Alfred (Coll. No. 1381).
GIBBULA BENZI Krauss.
Cat. No. 221a, U.S.N.M., two specimens collected by William
Stimpson on the North Pacific Exploring Expedition, at False Bay,
Cape of Good Hope. Cat. No. 186875, U.S.N.M., four specimens from
Port Alfred (Coll. No. 245). Cat. No. 186876a, U.S.N.M., one
specimen from the same locality (Coll. No. 246a).
GIBBULA CAPENSIS Gmelin.
Cat. No. 98261, U.S.N .M., two specimens from the Cape of Good
Hope. Cat. No. 253737, U.S.N.M., one specimen from the same
locality.
GIBBULA AGLAIA, new species.
Plate 27, figs. 1, 2, 3.
Shell depressed, conic, of yellowish white ground color, profusely
spotted and dashed with red. A series of large interrupted blotches
form a chain on the shoulder while the spiral cords are marked by
equally spaced, comma-shaped markings. On the peripheral cord
is another series of regularly spaced blotches, while one of the cords
of the base is marked at regular intervals with dots of red. Nuclear
whorls two, depressed helicoid. Postnuclear whorls well rounded,
appressed at the summit, marked between the sutures by three feebly
developed spiral cords which appear truncated posteriorly and slope
gently anteriorly to the next cord, giving the whorl the effect of
being wrapped by three turns of a bandage. The space between the
posterior edge of the first band and the summit is a little wider than
the other three spaces, which are equal. Suture moderately impressed.
Periphery of the last whorl rendered somewhat angular by the spiral
cord. Base broadly, openly umbilicated, marked with six spiral