Bulletin - United States National Museum - Smithsonian Institution

92 BULLETIN 91, UNITED STATES NATIONAL MUSEUM.
The type and two specimens, Cat. No. 250363, U.S.N.M., come
from Port Alfred (Coll. No. 1236). The type has four postnuclear
whorls, and measures: Length, 1.5 mm.; diameter, 0.7 mm.
ODOSTOMIA (ODOSTOMIA) ICAFRA, new species.
Plate 18, fig. 1.
Shell small, quite regularly conic, semi translucent, bluish white.
Nuclear whorls obliquely immersed in the first of the succeeding turns,
above which the tilted edge of the last volution only projects. Postnuclear
whorls slightly rounded, narrowly shouldered at the summit,
marked by exceedingly fine lines of growth. The posterior limit of the
interior of the whorl shines through the substance of the shell, and
causes the whorls to appear as if they had a double suture. Sutures
feebly impressed. Periphery of the last whorl well rounded. Base
slightly attenuated, well rounded, very narrowly uinbilicated, marked
by fine lines of growth only. Aperture Oval; posterior angle acute;
outer lip thin; inner lip strongly curved and reflected, provided with
a strong oblique fold at its insertion; parietal wall covered by a thin
callus.
The type, Cat. No. 250366, U.S.N.M., comes from Port Alfred
(Coll. No. 1239). It has six postnuclear whorls, and measures:
Length, 2.4 mm.; diameter, 1.2 mm.
Family ATLANTIDAE.
Genus ATLANTA Lesueur.
ATLANTA PERONII Lesueur.
One specimen, Cat. No. 250549, U.S.N.M., from Port Alfred (Coll.
No. 1422). Cat. No. 250551, U.S.N.M., contains two young specimens
from the same locality (Coll. No. 1424).
Family CYMATIIDAE.
Genus BURSA Bolten.
BURSA (MARSUPINA), species?
Cat. No. 186790, U.S.N.M., contains a specimen from Port Alfred
(Coll. No. 1 53) which resembles Bursa granifer of Lamarck, a Philippine
species. It is very likely the shell that has been reported from
South Africa under that name. Unfortunately the specimen before
me is not perfect enough to be properly diagnosed. Cat. No. 250439,
U.S.N.M., contains another young specimen from Port Alfred
(Coll. No. 1312.)
BURSA (MARSUPINA), species?
Cat. No. 187022, U.S.N.M., contains a specimen from Port Alfred
(Coll. No. 557) which resembles Bursa semigranosa from the Philip-
pines but is not that species. It is also too poor to permit of proper
diagnosis.