Bulletin - United States National Museum - Smithsonian Institution

SOUTH AFRICAN MARINE MOLLUSKS. 15
CLIONELLA CONFUSA Smith.
This species is wonderfully variable in coloration; 10 specimens
before me, Cat. No. 252108, U.S.N.M., selected from a lot of 76 specimens,
(Coll. No. 1607), from Port Alfred, show the following variations
in color. Some have the base white, the tip rose colored, and
the intermediate portion brown; the latter may be unicolor, spotted
or marbled with brown. Others are rose colored throughout, with
mottlings and spottings of brown; some of them even have the
narrow white zone at the summit, characterizing C. rosaria. Still
others are pale lavender with rose colored tips; these again may be
variously mottled. Some of them are uniformly rose colored without
any additional mottlings, while others are pale yellow. Some have
a narrow dark zone at the summit and another dark band on the base.
I have seen two additional lots from Port Alfred, 3, Cat. No.
186669, U.S.N.M. (Coll. No. 24), and Cat. No. 227756, U.S.N.M., six
specimens (Coll. No. 851). Cat. No. 90681, U.S.N .M., one from the
Cape of Good Hope. Cat, No. 979175, U.S.N.M., contains two from
the same locality. Cat. No. 187*97, U.S.N.M., contains a specimen
from Port Elizabeth.
CLIONELLA ROSARIA Reeve.
Cat. No. 186669a, U.S.N.M., one specimen from Port Alfred (Coll.
No. 24). Cat. No. 227757, U.S.N.M., four specimens from the same
locality (Coll. No. 852). Cat. No. 252109, U.S.N.M., 10 specimens
from the same place (Coll. No. 1608). In addition to these, I have
seen 70 specimens which have been returned to the collector, bearing
the same collector's number as the last.
CLIONELLA SYBARITICA, new spec'es.
Plate 7, fig. 8.
Shell elongate-conic. Nuclear whorls decollated. Post-nuclear
whorls moderately rounded, constricted at the sinus, which causes
the summit of the turns to appear as a cord. The space between the
sutures is variously mottled with flesh color and chestnut spots and
streaks. The base, beginning at the periphery, is rose colored, a little
paler on the columella than the rest. The whorls are marked with
strong, protractive, axial ribs, which are about as wide as the spaces
that separate them; of these, 14 occur upon the first to sixth whorl,
while on the last whorl the number increases to about 20. These ribs
are interrupted at the sinus a little distance below the summit, and
become decidedly enfeebled on the base, vanishing before they reach
the columella. In addition to the axial ribs the surface is marked by
numerous strong lines of growth. The spiral sculpture consists of
equal and equally spaced spiral striations, which are about as broad
as the spaces that separate them; these are best expressed in the