-
radula is heterodont, also
known as heteroglossan, in
which the
middle or
rhachidian tooth in each
array has
multiple cusps and the
lateral teeth are unicuspid...
- (Geb. der Schnecken, ii, pi. 20, fig. 7),
except that the
bases of the
rhachidian and
lateral teeth are subcircular, and on a few of the scythe-shaped cusps...
- The jaws are
developed or absent. The
radula is rhipidoglossate. The
rhachidian teeth are
always present and well-developed. The
lateral teeth generally...
- the
median rows, and
cross even the
uncini of the
opposite side. The
rhachidian or
median tooth has a
subquadrate basal part, with rounded,
convex posterior...
- It is
closely applied to the s****. The long
radula has a long,
narrow rhachidian tooth. It is
lanceolate with its tip
narrowand recurved.
There are 26...
- and the
shape of the
teeth agrees with that of the
known species. The
rhachidian tooth has a
subquadrate body,
narrower in front, with
concave upper and...
-
perhaps by erosion. The
inside of the s**** has a
smooth surface. The
rhachidian tooth of the
radula is
elongate with
convex sides. It has no reflected...
-
about ⅓ mm in breadth. It has
about 20
transverse rows of teeth; the
rhachidian tooth is broad,
depressed quadrangular with
rounded upper angles and pointed...
-
surface under the microscope. The
quite minute radula is peculiar. The
rhachidian and (on each side) five
laterals have
broad simple bases with a pear-shaped...
-
central part are very thin and transparent,
without distinct cusps; the
rhachidian tooth (R) is
broadly winged, bow-shaped, at its
upper part it is thickened...
