Loading your reading…

A Manual of Conchology: According to the System Laid Down by Lamarck, with the Late Improvements by De Blainville. Exemplified and Arranged for the Use of Students.Wyatt, Thomas

Science

A Manual of Conchology: According to the System Laid Down by Lamarck, with the Late Improvements by De Blainville. Exemplified and Arranged for the Use of Students.

Name: A Manual of Conchology: According to the System Laid Down by Lamarck, with the Late Improvements by De Blainville. Exemplified and Arranged for the Use of Students.
Author: Wyatt, Thomas

Wyatt, Thomas

Mollusks

This genus may be distinguished from the Solen by never having the
transverse oblong shape, or the edge of the valves parallel to the base.

                        Sanguinolaria occidens.
                        S. rosea.
                        S. livida.
                        S. rugosa.

_S. rosea._ The rosy Sanguinolaria.

Semi-orbicular, smooth, shining and convex; near the umbones of a
beautiful rose colour, which becomes paler as it descends; acute
transverse striæ.

_S. occidens._ The setting-sun Sanguinolaria. Pl. 7, fig. 4.

Oval, a little elongated, very compressed, slightly gaping, valves
elliptical, equally rounded at the two extremities, without mark of
posterior keel; summits slightly indicated; hinge formed by one or two
contiguous cardinal teeth on each valve; ligament projecting, convex;
margins not parallel.


                    2. Psammobia. Eighteen species.

Taken from the Tellina, which it much resembles in form, but from which
it differs by not having the irregular plait on the anterior part.

Shell ovate, transverse, slightly gaping; summits projecting; hinge
formed by two teeth on one valve, and only one inserted on the other.

                           Psammobia virgata.
                           P. Ferroensis.
                           P. vespertina.
                           P. florida.
                           P. muculosa.
                           P. cærulescens.
                           P. elongata.
                           P. flavicans.
                           P. squamosa.
                           P. alba.
                           P. Cayennensis.
                           P. lævigata.
                           P. tellinella.
                           P. pulchella.
                           P. aurantia.
                           P. fragilis.
                           P. livida.
                           P. Galathea.

_P. virgata._ The striped Psammobia. Pl. 7, fig. 1.

Species rather gaping, striated longitudinally, the teeth of the hinge
considerably effaced.

_P. Ferroensis._ The Ferro Psammobia.

Oblong oval; white, radiated with crimson; finely striated transversely;
valves obliquely truncated.


                      3. Psammotæa. Seven species.

Of the same form as the Psammobia, but differing in the number of teeth,
as the left valve of the Psammotæa has only one tooth; sometimes one
valve is toothless, while the other has two teeth.

Shell transverse oval or oblong; gaping a little at the sides; one
primary tooth on each valve, though sometimes on only one of them;
ligament exterior, attached to callosities at the hinge, and without an
irregular plait.

                          Psammotæa violacea.
                          P. zonalis.
                          P. pellucida.
                          P. serotina.
                          P. candida.
                          P. Tarentina.
                          P. donacina.

Public-domain text, read in full here on John Shaqi.

A Manual of Conchology: According to the System Laid Down by Lamarck, with the Late Improvements by De Blainville. Exemplified and Arranged for the Use of Students.

No reviews yet