Bulletin - United States National Museum - Smithsonian Institution

126 BULLETIN 91, UNITED STATES NATIONAL MUSEUM.
The type and two specimens, Cat. No. 187062, U.S.N.M., come from
Port Alfred (Coll. No. 600). The type has four postnuclear whorls,
and measures: Length, 1.3 mm.; diameter, 1 mm. Cat. No. 250427,
U.S.N.M., contains two specimens from Port Alfred (Coll. No. 1300).
SABANAEA THALIA, new species.
Plate 6, fig. 6.
Shell pupiform, with blunt apex, subdiaphanous. Nuclear whorls
not differentiated from the later turns; all whorls strongly rounded
and appressed at the summit, through which the preceding whorl
shines, which gives the whorls the aspect of having a double suture.
Spire marked with decidedly retractive lines of growth, and exceed-
ingly fine, spiral striations. Sutures moderately constricted. Periphery
of the last whorl well rounded. Base moderately long, um-
bilicated, well rounded, slightly attenuated anteriorly, marked like
the spire. Aperture subcircular, posterior angle obtuse; outer Up
thin; inner lip thin, strongly curved, free, slightly reflected over the
umbilicus; parietal wall covered with a thick callus, which is free at
the edge, and renders the peritreme complete. The type and two
specimens, Cat. No. 187058, U.S.N.M., come from Port Alfred (Coll.
No. 596). The type has six whorls, and measures: Length, 1.7 mm.;
diameter, 0.8 mm. Cat. No. 227742a, U.S.N.M., contains two specimens
from the same locality (Coll. No. 837), and Cat. No. 227743,
U.S.N.M., seven specimens from the same source (Coll. No. 838).
In addition to these, we have seen 105 specimens from Port Alfred
which have been returned to Colonel Turton (Coll. No. 1594).
Genus AMPHITHALAMUS Carpenter.
AMPH1THALAMUS TURTONI, new species.
Plate 6, fig. 5.
Shell very minute, pupiform, pale horn color. Nuclear whorls one
and one-half, marked with many, exceedingly fine, spiral striations and
lines of growth, the combination of the two lending these whorls an
exceedingly finely pitted appearance. Postnuclear whorls rather
high between the sutures, appressed at the summit, well rounded,
marked by fine, decidedly retractive lines of growth. Sutures
strongly constricted. Periphery of the last whorl well rounded. Base
attenuated anteriorly, marked like the spire. Aperture oval; outer
lip thick within, thin at the edge; inner lip decidedly curved; parietal
wall built out to form a shelf, the inner edge of which forms the parie-
tal Up of the aperture.
The type and nine specimens of this species, Cat. No. 187061, U.S.
N.M., were collected at Port Alfred (Coll. No. 599). The type has a
little more than four whorls, and measures: Length, 1 mm.; diameter,
0.5 mm.