Bulletin - United States National Museum - Smithsonian Institution

90 BULLETIN 91, UNITED STATES NATIONAL MUSEUM.
angulated. Base rather short, narrowly umbilicated, well rounded,
marked like the spire. Aperture oval; posterior angle obtuse; outer
lip thin; inner lip oblique, slightly curved, appressed, provided with
a strong fold at its insertion; parietal wall covered with a thick
callus.
The type and another specimen, Cat. No. 186852a, U.S.N.M.,
come from Port Alfred (Coll. No. 219). The type has five and one-
half postnuclear whorls, and measures: Length, 3 mm.; diameter,
1.5 mm.
ODOSTOMIA (EVALEA) GEA, new species.
Plate 19, fig. 1.
Shell small, elongate -conic, white. Nuclear whorls deeply, ob-
liquely immersed in the first of the succeeding turns, giving the
shell a truncated appearance. Postnuclear whorls weakly rounded,
very strongly shouldered at the summit, marked by vertical lines
of growth, and exceedingly fine, microscopic spiral striations.
Sutures strongly impressed. Periphery of the last whorl somewhat
inflated, feebly angulated. Base well rounded, strongly umbili-
cated, marked like the spire. Aperture oval; posterior angle acute;
outer lip thin, reinforced within by six equal and equally spaced
slender, spiral lirations; inner lip almost vertical, slightly curved,
feebly reflected, provided with a strong fold at its insertion; parietal
wall glazed with a thin callus.
The type and another specimen, Cat. No. 187073, U.S.N.M., come
from Port Alfred (Coll. No. 612). The type has almost six postnuclear
whorls, and measures: Length, 2.6 mm.; diameter, 1.2 mm.
ODOSTOMIA (EVALEA) CIFARA, new species.
Plate 18, fig. 8.
Shell elongate-conic, thin, semitranslucent, strongly umbilicated,
bluish white. Nuclear whorls small, immersed in the first of the
succeeding turns, above which the tilted edge of the last volution
only projects. Postnuclear whorls moderately well rounded, narrowly,
slopingly shouldered at the summit, marked by numerous, very
fine, spiral fines, and very slender, almost vertical lines of growth.
The limit at the summit of the interior chamber of the whorls shines
through the texture of the shell, and causes this to appear as if it
had a double suture. Periphery of the last whorl somewhat inflated,
strongly rounded. Base rather short, inflated, quite markedly um-
bilicated, marked like the spire. Aperture rather large, oval; pos-
terior angle acute; outer lip thin; inner lip strongly curved, re-
flected but free, bearing a strong oblique fold opposite the umbilicus.
Parietal wall covered by a moderately thick callus.