Bulletin - United States National Museum - Smithsonian Institution

SOUTH AFRICAN MARINE MOLLUSKS. 73
flattened and marked by very fine spiral striatums. Periphery of
the last whorl well rounded. Base moderately long, well rounded,
marked like the spire, the incised spiral grooves becoming a little
more closely spaced toward the anterior end. Of these grooves, 10
are present on the base. Aperture ovate; posterior angle obtuse;
outer lip thin, showing the external sculpture within, rendered
slightly wavy by the sculpture; columella oblique, slightly curved,
reflected over and appressed to the base; parietal wall covered by a
thin callus.
The type, Cat. No. 249738, U.S.N.M., comes from Port Alfred
(Coll. No. 1010). It has six postnuclear whorls, and measures:
Length, 5.9 mm.; diameter, 2 mm.
PYRAMJDELLA (SYRNOLA) CAPENSIS Sowerby.
Three specimens of this species are in the collection of the United
States National Museum, all from Port Alfred. Cat. No. 186841,
three specimens (Coll. No. 208). Cat. No. 250409, one specimen
(Coll. No. 1282). Cat. No. 249714, two specimens (Coll. No. 986).
PYRAMIDELLA (SYRNOLA) PYRRHA, new species.
Plate 14, fig. 8.
Shell elongate-conic; creamy yellow, with a narrow, golden brown
band situated about one-fourth of the distance between the summit
and suture posterior to the suture. (Nuclear whorls decollated.)
Postnuclear whorls slightly rounded, feebly shouldered at the summit,
marked with numerous fine, slightly retractive, incremental lines,
and exceedingly fine, spiral striatums. Periphery of the last whorl
well rounded. Base slightly produced, well rounded, marked like the
spire. Aperture subquadrate; posterior angle obtuse, outer lip thin,
inner lip flexuous, slightly reflected, and provided with a moderately
strong fold a little anterior to its insertion; parietal wall glazed with
a thin callus.
The type, Cat. No. 186841c, U.S.N.M., comes from Port Alfred
(Coll. No. 208). It has lost the nuclear whorls and early postnuclear
turns; the seven remaining measure: Length, 5.8 mm.; diameter, 1.9
mm. Cat. No. 250408a U.S.N.M., contains an additional specimen
from Port Alfred (Coll. No. 1281).
PYRAMIDELLA (SYRNOLA) AGANEA, new name.
Plate 14, fig. 9.
=EuUmella nivea Smith, Journ. Malac., vol. 11, p. 36, pi. 3, fig. 2, 1904. Not
Obeliscus ( Triptychus) niveus Morch, Mai. Blat., vol. 22, p. 158, 1875. [Both
are Pyramidellas.]
This species was originally described as Ealimella nivea. I have
ground the specimen and find but a single fold on the columella. It
must therefore be referred to the subgenus Syrnola. The specimen