Bulletin - United States National Museum - Smithsonian Institution

202 BULLETIN 91, UNITED STATES NATIONAL MUSEUM.
middle, but the shell is much more inflated posterior to the umbones
than anterior. Outer surface marked with irregularly spaced, rather
strong, incremental lines, and exceedingly fine papulations, which
lend the surface a shagreened appearance. The character of the
hinge is shown in our detailed figure.
The type and two valves, Cat. No. 186968, U.S.N.M., come from
Port Alfred (Coll. No. 341). The type measures: Altitude, 3.3 mm.;
length, 4.1 mm.
There are four additional lots of this species in the collection of the
United States National Museum, all from Port Alfred, as follows:
Cat. No. 249888, three specimens (Coll. No. 1160); Cat. No. 251025, a
young valve (Coll. No. 1542) ; Cat. No. 251042, three specimens (Coll.
No. 1559); Cat No. 251058, one young valve (Coll. No. 1575).
This species is probably what has been reported from South Africa
as Lasea australis Sowerby. It differs from it in general outline, and
in being a much thinner shell of much finer external sculpture. It is
likewise smaller, the Australian species being very coarse in every way.
Family KELLIELLIDAE.
Genus ALIGENA H. C. Lea.
ALIGENA OVALIS Smith.
Cat. No. 186959, U.S.N.M., one specimen from Port Alfred (Coll.
No. 329).
Family CARDIIDAE.
Genus CARDIUM Lamarck.
CARDIUM TURTONI Sowerby.
Cat. No. 186934, U.S.N.M., two specimens from Port Alfred (Coll.
No. 304).
Genus PAPYRIDEA Swainson.
PAPYRIDEA (FULVIA) NATALENSIS Sowerby.
Cat. No. 186935, U.S.N.M., two specimens from Port Alfred (Coll.
No. 305). Cat. No. 251003, U.S.N.M., contains a very young valve
from the same locality (Coll. No. 1520).
Family VENERIDAE.
Genus DOSINIA Seopoli.
DOSINIA HEPATICA Lamarck.
There are four lots of this species in the collection of the United
States National Museum, all from Port Alfred, as follows: Cat. No.
186936, two specimens (Coll. No. 306); Cat. No. 186961a, one valve
(Coll. No. 332a) ; Cat. No. 187178, one valve (Coll. No. 729) ; Cat. No.
251015, one specimen (Coll. No. 1532).