Bulletin - United States National Museum - Smithsonian Institution

44 BULLETIN 91, UNITED STATES NATIONAL MUSEUM.
MITRA IMA, new species,
Plate 21, fig. 4.
Shell small, cylindro-conic, pale brown, variegated with whitish
spots and spots of rust color. Nuclear whorls decollated, the succeed-
ing turns well rounded, slightly shouldered at the summit, crossed
by obsolete axial ribs, of which 12 occur upon the first to third and 14
upon the penultimate whorl. Sutures well marked. Periphery of
the last whorl well rounded. Base prolonged, well rounded, free of
all sculpture. Aperture channeled anteriorly; posterior angle acute;
outer lip moderately thick; columella provided with four oblique
folds, of which the posterior is the strongest, the others decreasing in
size consecutively; parietal wall covered with a moderately thick
callus. The color markings consist of a light brown ground color,
each whorl of the spire being marked with two interrupted bands of
white, the first of which is on the middle of the whorl, and the second
immediately posterior to the suture. The white areas are on the
middle of the ribs and each white area is bounded on all sides with a
rust-colored edging in the middle subsutural band. This rust color is
absent at the posterior margin, while the ground color of the whole
base is made up of this tint. The base, in addition, is marked with
four interrupted bands of unequal width and unequal spacing of
whitish spots.
The type, Cat. No. 250346, U.S.N.M., comes from Port Alfred (Coll.
No. 1219). It has four postnuclear whorls, and measures: Length,
9 mm.; diameter, 4 mm.
MITRA EUZONATA Sowerby.
Cat. No. 186735, U.S.N.M., two specimens from Port Alfred (Coll.
No. 94).
MITRA KOWIENSIS Sowerby.
Cat. No. 186737, U.S.N.M., five specimens from Port Alfred (Coll.
No. 96).
Cat. No. 272155, U.S.N.M., two from Kowie, South Africa.
MITRA LATRUNCULARIA Reeve.
Cat. No. 98011, U.S.N.M., six specimens from Albany, South Africa.
Cat. No. 186730, U.S.N.M., one from Port Alfred (Coll. No. 89).
MITRA CARIFA, new species.
Shell rather large, elongate-ovate, brown, excepting two spiral
cords that form the anterior half of the whorls between the sutures,
which are yellow. Nuclear whorls decollated. Postnuclear whorls
narrowly, roundly shouldered at the summit, the rest marked by
four strong, broad, flattened, spiral cords between the sutures, which