Bulletin - United States National Museum - Smithsonian Institution

138 BULLETIN 91, UNITED STATES NATIONAL MUSEUM.
NATICA ALFREDENSIS, new species.
Plate 13, figs. 4, 7, 10.
Shell of medium size, irregularly ovate, early whorls bluish, later
ones light buff, marked with a series of retractively sloping streaks of
brown near the summit, and numerous small dots of brown. The
callus and columellar area are white. Early whorls well rounded,
the later ones a little less so. The last whorl is strongly appressed
at the summit, which lends it a somewhat pinched-in appearance
immediately below the summit. Periphery and base of the last whorl
well rounded. Aperture oval; outer lip thin, purplish brown deep
within, white at the edge; inner lip strongly curved; parietal wall
covered with a very thick callus, which is entire.
The type and two specimens of this species, Cat. No. 187085,
U.S.N.M., come from Port Alfred (Coll. No. 627). The type has four
and one-half whorls, and measures: Length, 17 mm.; diameter, 14.5
mm. Three additional lots are in the collection of the United States
National Museum from the same locality. Cat. No. 249752, three
specimens (Coll. No. 1024). Cat. No. 249754, two specimens (Coll.
No. 1026). Cat. No. 249748, three specimens (Coll. No. 1020.)
NATICA FORATA Reeve.
Cat. No. 17096, U.S.N.M., one specimen from Cape of Good Hope.
Cat. No. 43134, U.S.N.M., eight specimens from the same place.
Cat. No. 46445a, U.S.N.M., one specimen from the same locality.
Cat. No. 186830, U.S.N.M., four specimens from Port Alfred (Coll.
No. 196).
NATICA AFRICANA, new species.
Plate 13, figs. 13, 14, 15.
Shell similar to N. forata, but decidedly elevated, and with a much
narrower umbilicus. The coloration is as follows : ground color pearl
gray; a narrow band, of short, axially disposed streaks of light brown,
is situated at the summit; while five, equal and equally spaced, narrow
bands encircle the whorls; the first of these is a little farther from the
brown band at the summit than from its neighbor anteriorly. These
bands are composed of narrow, arrow-shaped elements, which are
white, tipped with brown, and are arranged in cone-in-cone series,
pointing forward. In addition to these bands, the whorls are
marked by alternating lines of light and darker color, which coincide
with the lines of growth. The umbilical area and the region adjacent
to it, as well as the thin callus, are white, the whorls are well rounded,
smooth. Umbilicus narrowly funnel-shaped ; umbilical wall provided
with two spiral keels. Aperture oval, dark purple within, thin and
white at the edge ; inner lip curved and very slightly reflected ; parietal
wall covered with a thin callus.