Bulletin - United States National Museum - Smithsonian Institution

SOUTH AFKICAN MAEINE MOLLUSKS. 135
JEFFREYSIA CAPENSIS Sowerby.
Seven lots of this species are in the collection of the United States
National Museum, all from Port Alfred. Cat. No. 187059, six specimens
(Coll. No. 597). Cat. No. 187068, one specimen (Coll. No. 606).
Cat. No. 186812a, one specimen (Coll. No. 178a). Cat. No. 187063a,
two specimens (Coll. No. 601). Cat. No. 250431, two specimens (Coll.
No. 1304). Cat. No. 249723, one specimen (Coll. No. 995). In addi-
tion to these we have seen 67 specimens in Colonel Turton's collection.
(Coll. No. 1592).
Family ASSIMINEIDAE.
Genus ASSIMINEA Leach.
ASSIMINEA OVATA Krauss.
Three lots of this species are in the collection of the United States
National Museum, from Port Alfred, Cat. No. 1868146, one specimen
(Coll. No. 180). Cat. No. 227735, three specimens (Coll. No. 830).
Cat. 249728, two specimens (Coll. No. 1000).
ASSIMINEA UMLAASIANA Smith.
The United States National Museum contains three lots of this
species from Port Alfred. Cat. No. 186814, three specimens (Coll.
No.. 180). "Cat. No. 186815, six specimens (Coll. No. 181). Cat. No.
227734, eight specimens (Coll. No. 829). In addition to these I have
seen 78 specimens from Port Alfred which have been returned to
Colonel Turton (CoU. No. 1596).
ASSIMINEA CAPENSIS, new species.
Plate 6, fig. 9.
Shell broadly conic, thick, light brown. Nuclear whorls not dif-
ferentiated from the postnuclear turns. Postnuclear whorls well
rounded, feebly shouldered at the summit, marked by decidedly
retractive lines of growth and exceedingly fine spiral striations.
Sutures moderately constricted. Periphery of the last whorl strongly
inflated, obscurely angulate. Base short, well rounded, marked like
the spire. Aperture very large, irregularly ovate; posterior angle
acute; outer lip thick within, thin at the edge; inner lip thick,
appressed, strongly curved, continuous with the thick parietal
callus.
The type, Cat. No. 186814a, U.S.N.M., comes from Port Alfred
(Coll. No. 180). It has six whorls, and measures: Length, 6 mm.;
diameter, 3.5 mm. Cat. No. 227824 U.S.N.M., contains two specimens
from the same locality (Coll. No. 829a). Another specimen, Cat. No.
250414, U.S.N.M., is from the same locality (Coll. No. 1287).