Bulletin - United States National Museum - Smithsonian Institution

94 BULLETIN 91, UNITED STATES NATIONAL MUSEUM.
CYMATIUM OLEARIUM Linnaeus.
Cat. No. 227774, U.S.N.M., two specimens from Port Alfred
(Coll. No. 869). Cat. No. 250435, U.S.N.M., one specimen from the
same place (Coll. No. 1308).
CYMATIUM AFRICANUM A. Adams.
Cat. No. 186786, U.S.N.M., one specimen from Port Alfred (Coll.
No. 147).
CYMATIUM KLENEI Sowerby.
Cat. No. 186789, U.S.N.M., two specimens from Port Alfred (Coll.
No. 150).
Genus NYCTILOCHUS Gistl.
NYCTILOCHUS ALFREDENSIS, new species.
Plate 4, fig. 4.
Shell similar to certain forms of T. australis Lamarck, but with
almost complete absence of nodules. Color orange, with obscure
squares and rectangular spots of brown. Nuclear whorls decollated.
Postnuclear whorls well rounded, appressed at the summit, moder-
ately constricted at the sutures, marked axially by rather irregularly
spaced, scarcely elevated varices, and numerous, very slender, closely
spaced, raised threads. The spiral markings consist of subequal
and rather closely, subequally spaced lirations. The same sculpture
holds good on the base and rostrum. On the latter, the spiral threads
assume a duplex development, some being coarser than others, the
coarser being separated by two or three of the finer. The last turn
has a single nodule a little behind the variced aperture, situated
almost midway between the summit and the periphery. Aperture
pale rose within, channeled anteriorly; posterior angle acute, outer
lip reinforced by a weak varix; columella sinuous, glazed with a callus
with several slight lirations on the anterior end; parietal wall pro-
vided with a slender lamella a little anterior to the posterior angle of
the aperture.
The type, Cat. No. 186785, U.S.N.M., comes from Port Alfred
(Coll. No. 146). "It has lost the nucleus; the five turns which remain
measure: Length, 60.5 mm.; diameter, 31.2 mm.
An additional specimen, Cat. No. 250436, U.S.N.M., from the same
source (Coll. No. 1309), has also lost the nucleus and probably some
of the early turns; the remaining seven measure: Length, 98 mm.;
diameter, 51 mm. In this the outer lip is reinforced within at the
edge. The reinforced portion consists of alternating bands of light and
dark, the lighter ones being about one-third as wide as the broad dark