Bulletin - United States National Museum - Smithsonian Institution

SOUTH AFRICAN MARINE MOLLUSKS. 137
CREPIDULA LENTIGINOSA Sowerby.
Cat. No. 98051, U.S.N.M., three specimens from Albany. Cat.
No. 19173, U.S.N.M., one specimen from Port Elizabeth. Cat. No.
186826a, U.S.N.M., one specimen from Port Alfred (Coll. No. 192).
Cat. No. 249786, U.S.N.M., four specimens from the same locality
(Coll. No. 1058).
Family LAMELLARIIDAE.
Genus LAMELLARIA Montagu.
LAMELLARIA PERSPICUA Linnaeus.
One specimen, Cat. No. 250530, U.S.N.M., from Port Alfred (Coll.
No. 1403). Cat. No. 250532, U.S.N.M., one young specimen from
the same place (Coll. No. 1405). Cat. No. 249768, U.S.N.M., three
young specimens from the same locality (Coll. 1040).
Family NATICIDAE.
Genus NATICA Seopoli.
NATICA IMPERFORATA Gray.
Cat. No. 98024, U.S.N.M., twelve specimens from Kassouga,
Albany. Cat. No. 21800, U.S.N.M., one specimen from Algoa Bay.
Cat. No. 186829, U.S.N.M., three specimens from Port Alfred (Coll.
No. 195).
NATICA STIMPSONI, new species.
Plate 13, figs. 5, 8, 11.
Shell large, subglobose, imperforate, bluish white, speckled with
numerous dots of brown over the entire surface, excepting a narrow
band on the shoulder of the whorls and another a little anterior to the
periphery, which are marked by a series of quite regularly spaced tri-
angles, the apexes of which point forward. The whorls are inflated,
slopingly shouldered at the summit, the rest well rounded, marked by
numerous strong lines of growth, and fine spiral lirations. Periphery
and base of the last whorl well rounded, marked like the spire. Aper-
ture large, oval ; outer lip thin ; inner lip thick, curved and strongly
reflected over the umbilical area; parietal wall covered with a very
thick callus, having a notch a little nearer the posterior angle of the
aperture than its junction with the inner lip.
The type, Cat. No. 93, U.S.N.M., was collected by William Stimpson
on the North Pacific Exploring Expedition at Simons Ba} T , Cape
of Good Hope. It has five and one-half whorls, and measures:
Length, 38.5 mm.; diameter, 36 mm.
NATICA, species?
Cat. No. 187082, U.S.N.M., three poor specimens from Port Alfred
which I am unable to refer to any known form (Coll. No. 624). Cat.
No. 249750, U.S.N.M., contains two additional specimens, in an
equally poor condition, from the same place (Coll. No. 1022).