- s****.
paucispiral or oligogyrous: with few
spirals as in Littorina.
subspiral or
scarcely spiral, in
Thiara multispiral or polygyrous:
having many closely...
-
shiny surface. It is
prominently encircled by red-brown zones,
which are
subspiral and
occasionally confluent,
especially near the base.
Almost obsolete...
-
whorls rather rounded,
mouth ovate, axis 3 lines;
operculum horny and
subspiral: variety,
spire rather longer,
whorls more rounded. This
species is like...
-
Subreflected –
Moderately turned back.
Subrotund –
Moderately round.
Subspiral –
Moderately spiral.
Subtriangulate –
Moderately or
almost triangular...
- a
patelliform shape with a posterior,
inclined apex and a compressed,
subspiral nucleus.
Inside it has a porcellaneous, muscle-scar horseshoe-shaped,...
-
diagnosis reads as follows: Stenothyrinæ. S**** turbinate.
Operculum subspiral, calcareous.
Distribution Indian. Stenothyra, Gabbia.
Currently the genus...
- is
slightly concave to
almost flat,
sculptured with fine, irregular,
subspiral striae which run at
almost right angles. The
aperture lower lip is somewhat...
-
length of the s****;
aperture ovate,
outer lip acute.
Operculum corneous,
subspiral. Foot
rather short for the
length of the s****,
broadest in
front and...
- shouldered. The s**** is
densely pointed or stained. The
large umbilicus is
subspiral. The
aperture is large. The
sutures are very impressed. The type locality...
-
Cranopsis pelex, A. Adams, and is
laterally compressed. The
vertex is
subspiral, and
posteriorly deflexed so as to
reach the
hinder margin. The interstices...
