Bulletin - United States National Museum - Smithsonian Institution

40 BULLETIN 91, UNITED STATES NATIONAL MUSEUM.
The type, Cat. No. 127a, U.S.N.M., has four whorls and measures:
Length, 6.8 mm., diameter, 3.5 mm. It was collected by William
Stimpson on the North Pacific Exploring Expedition in Simons Bay.
This may be the shell that has been listed as MargineUa bulbosa
Reeve, from South Africa. M. bulbosa Reeve is an inflated form
with less elevated spire and comes from Borneo. Cat. No. 17307,
U.S.N .M., comes from Cape of Good Hope. Three additional lots,
all from Port Alfred, are in the collection of the United States National
Museum. Two, Cat. No. 249670 (Coll. No. 942). One, Cat. No.
250331 (Coll. No. 1204), and one, Cat. No. 250324 (Coll. No. 1197).
MARGINELLA CYLINDRICA Sowerby.
Cat. No. 186721, U.S.N.M., one specimen from Port Alfred (Coll!
No. 80). Cat. No. 250325, U.S.N.M., one specimen from the same
locality (Coll. No. 1198).
MARGINELLA FALLAX Smith.
Cat. No. 186723, U.S.N.M., three specimens from Port Alfred
(Coll. No. 82).
MARGINELLA LEPTA, new species.
Plate 21, fig. 3.
Shell elongate-oval, semitransparent, white. Spire short, broadly
conic. Suture well impressed. Surface polished, marked only by
exceedingly fine lines of growth. Aperture gradually increasing in
width from the posterior angle anteriorly; outer lip thin, not denticu-
lated. Columella curved, with a moderately thick callus which is
provided with six oblique folds, the second of which is the strongest,
the first follows in succession of strength and borders the anterior
edge of the columella; the four remaining decrease in size and spacing
from the third to sixth.
Two specimens of this species, Cat. No. 249673, U.S.N.M., come
from Port Alfred. (Coll. No. 945.) One of these, the type, measures
Length, 5.1 mm.; diameter, 2.6 mm.
MARGINELLA DTJLCIS Smith.
Cat. No. 186725, U.S.N.M., five specimens from Port Alfred (Coll.
No. 84).
MARGINELLA BURNUPI Sowerby.
Cat. No. 186719, U.S.N.M., three specimens from Port Alfred
(Coll. No. 78). Cat. No. 249671, U.S.N.M., contains another specimen
from the same place (Coll. No. 943).
MARGINELLA DIFFERENS Smith.
Cat. No. 186720, U.S.N.M., three specimens from Port Alfred (Coll.
No. 79).
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