Bulletin - United States National Museum - Smithsonian Institution

SOUTH AFRICAN MARINE MOLLUSKS. 61
thread appears midway between the spiral cords. Periphery of the
last whorl well-rounded. Base somewhat produced, marked by seven
cords equaling those on the anterior portion of the spire in strength.
The four grooves between the cords anterior to the periphery have
each a slender spiral thread. Aperture irregularly oval, channeled
anteriorly and posteriorly; outer lip thin at the edge, where it is rendered
somewhat sinuous by the external sculpture, thick within and
armed by a callus, bearing seven denticles, columella stout, slightly
curved, and partly reflected over the body whorl.
The type has six whorls and measures: Length, 18.5 mm.; diam-
eter, 10.1 mm. The type and another specimen, Cat. No. 272130,
U.S.N.M., were received from Mr. John B. Henderson in a collection
recently donated to the United States National Museum, which was
purchased from Sowerby and Fulton, and was labelled " Pentadactyluslividus
Reeve, South Africa." It is not Reeve's species, which
comes from the Philippines and which we have in the collection of the
National Museum from the type locality. True lividus is a much stouter
species with different detailed sculpture. The specimens reached me
as this paper was passing through press. I was therefore unable to
add a figure of it.
Genus THAIS Bolteri.
THAIS CAPENSIS Petit.
Cat. No. 186778, U.S.N.M., one from Port Alfred (Coll. No. 139).
THAIS TEXTURATA Smith.
Cat. No. 186779, U.S.N.M., two from Port Alfred (Coll. No. 140).
THAIS CASTANEA Kuster.
Cat. No. 186782, U.S.N.M., two from Port Alfred (Coll. No. 143).
THAIS CATARACTA Chemnitz.
Cat. No. 186781, U.S.N.M., three from Port Alfred (Coll. No. 142).
THAIS SQUAMOSA Lamarck.
Cat. No. 186780, U.S.N.M., one from Port Alfred (Coll. No. 141).
Genu^ LATIAXIS Swainson.
LATIAXIS ROSACEUS Smith.
Cat. No. 186783, U.S.N.M., two from Port Alfred (Coll. 144).
Family CORALLIOPHILIDAE.
Genus CORALLIOPHILA H. and A. Adams.
CORALLIOPHILA RUBROCOCCINEA Melvill and Standen.
Cat. No. 186784, U.S.N.M., one specimen from Port Alfred (Coll.
No. 145).
Cat. No. 187028, U.S.N.M., one from the same place (Coll. No. 564).