Bulletin - United States National Museum - Smithsonian Institution

74 BULLETIN 91, UNITED STATES NATIONAL MUSEUM.
figured measures: Length, 7.5 mm.; diameter, 2.2 mm. Cat. No.
186858, U.S.N.M. (Coll. No. 228). Two specimens of this species collected
at Port Alfred (Coll. No. 228). Cat. No. 249705, U.S.N.M.,
two additional specimens from Port Alfred (Coll. No. 977).
PYRAMIDELLA (SYRNOLA) MINOR Smith.
Cat. No. 186859, U.S.N.M., contains a specimen from Port Alfred
(Coll. No. 229).
PYRAMIDELLA (SYRNOLA), species ?
Cat. No. 187074, U.S.N.M., contains a young individual from Port
Alfred which we are unable to refer to any of the known forms (Coll.
No. 614).
PYRAMIDELLA (SYRNOLA) TARPEIA, new species.
Plate 14, fig. 6.
Shell small, elongate-conic, subdiaphanous. Nuclear whorls small,
very obliquely immersed in the first of the succeeding turns, above
which the rounded, tilted edge of the last volution only projects.
Postnuclear whorls high between the sutures, slightly rounded,
feebly shouldered at the summit; marked by retractive fines of
growth, and exceedingly fine, spiral striations. Sutures well impressed.
Periphery of the last whorl well rounded. Base somewhat
prolonged, well rounded, marked like the spire. Aperture oval,
posterior angle acute, outer lip thin, inner lip very short, decidedly
curved, slightly reflected, appressed; parietal wall covered with a
moderately thick callus.
The type and two specimens, Cat. No. 187077, U.S.N.M., come
from Port Alfred (Coll. No. 618). The type has almost six. postnuclear
whorls, and measures: Length, 3.7 mm.; diameter, 1.3 mm.
PYRAMIDELLA (SYRNOLA) HERA, new species.
Plate 15, fig. 6.
Shell elongate-conic, milk white. Nuclear whorls more than one,
obliquely immersed in the first of the succeeding turns, above which
the tilted edge of the last volution only projects. Postnuclear whorls
very slightly rounded, very feebly shouldered at the summit, marked
by rather coarse lines of growth and exceedingly fine spiral striations.
The preceding whorl shines through the substance of the succeeding
turns near the summit and appears as a band a little differently
colored than the rest of the shell. Sutures well marked. Periphery
well rounded. Base slightly prolonged, well rounded. Aperture
ovate; posterior angle acute; outer lip thin; the inner lip, short;
reflected over and appressed to the base; parietal wall covered with
a thin, callus.