-
submargined by
narrow band. The
apertureis narrowly ovate; high,
acutely subangled above,
produced below into a
short oblique siphonal canal with straightened...
- proper, of
which there are 3,
lightly convex, body-whorl very
slightly subangled for a
short distance in
front of suture,
which is deep and channelled...
-
whorls are
separated by a
channeled suture,
flattened on the
shoulder and
subangled at the periphery, the last
slightly descending behind the aperture. Colour :...
- body whorl. At
first no
spiral sculpture, then a
faint groove on the
subangled periphery just
above lower suture, on
penultimate and body
whorls this...
-
elevated spire. The base of the s**** is flattened. The
periphery is
subangled. The
seven whorls increase gradually in size. They are
regularly rounded...
- The s****
contains 7 whorls, rounded,
constricted at the suture, and
subangled at the shoulder. The
protoconch contains 2½ whorls, smooth, symmetrical...
-
devoid of sculpture. The body
whorl is
flattish above,
sharply convex to
subangled at the periphery,
concave below that, and cut in
rapidly to the axis of...
- of
their s****
morphology include the
rounded s**** of the last whorl,
subangled or angled. As with all
other species of Beddomeia, B.
waterhouseae is...
-
being very much more
slender than the others. The body
whorl is
obtusely subangled at the periphery. In the
umbilical region it is
opaque white and smooth...
- [than
Onoba lactea].
Whorls more convex, with
deeper sutures.
Peripheral subangle marked by a thread,
indications of
other spiral threads present. Faint...
