Bulletin - United States National Museum - Smithsonian Institution

SOUTH AFRICAN MARINE MOLLUSKS. 161
rounded spiral cords on the first two postnuclear whorls and as broad
flattened cords on the last turn. Eight of these spiral cords appear
on the first, seven on the second, while on the last turn 12, including
the peripheral cord, appear between the periphery and the summit,
those nearest the periphery on this whorl being much narrower than
on the posterior portion of the whorl. Sutures well marked. Periph-
ery of the last whorl very strongly angulated. Base very short,
slightly concave, broadly, openly umbilicated, marked by 12 de-
pressed, rounded spiral cords of somewhat varying width. The entire
surface of the shell is marked by slender lines of growth which extend
over the base and into the umbilicus. Aperture very oblique, large;
outer lip thin, showing the external sculpture within ; inner lip almost
vertical, sinuous, reflected over and appressed to the preceding whorl.
The type and another specimen, Cat. No. 187111, U.S.N.M., come
from Port Alfred (Coll. No. 657). The type has three and one-half
postnuclear whorls, and measures: Altitude, 3.5 mm.; greater diameter,
5 mm.
Genus SOLARIELLA Wood.
SOLARIELLA FUSCOMACULATA Smith.
Cat. No. 187099, U.S.N.M., two specimens from Port Alfred (Coll.
No. 643).
SOLARIELLA, species ?
Cat. No. 187100, U.S.N.M., contains three specimens from Port
Alfred (Coll. No. 644), which belong to this genus, but which are too
worn to be properly identified. Cat. No. 250525, U.S.N.M., contains
two additional specimens of this species, but also too worn to serve
for diagnosis (Coll. No. 1398), from Port Alfred.
Genus CALLIOSTOMA Swainson.
CALLIOSTOMA EUCOSMIA, new species.
Plate 25, figs. 1, 2, 3.
Shell broadly conic, of wax ground-color, variously mottled and
clouded with patches of white and brown; on the spire there is also a
narrow purple band which extends over the periphery and a little pos-
terior to it on the early whorls. On the base, particularly on the area
adjacent to the umbilical region, brown flakes alternating with flakes
of white, form a chain-like pattern. Nuclear whoils about one and
one-half, well rounded, smooth. Postnuclear whorls moderately
rounded, marked with subequal, and subequally spaced, granulose,
spiral cords, of which 4 occur upon the first, 5 upon the second, 7 upon
the third, 12 upon the fourth, and 23 upon the last whorl between the
sutures. These cords are about as wide as the spaces that separate
them. The tubercles on them are elongated, their long axes coincid-