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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. — 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.Wyatt, Thomas

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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

Shell elongated oval, very thin, fragile, semipellucid; much inflated at
one end like a duck’s bill, whence it derives its common name;
equivalve, very inequilateral; hinge toothless; the anterior side
rounded and much longer than the posterior; ligament interior affixed to
a bony spoonlike process in each valve, and sustained by a lateral plate
running obliquely into the interior of the shell.

                            Anatina laterna.
                            A. truncata.
                            A. subrostrata.
                            A. longirostris.
                            A. globulosa.
                            A. trapezoides.
                            A. rugosa.
                            A. imperfecta.
                            A. myalis.
                            A. rupicola.

_A. subrostrata._ The beaklike Anatina.

Species equivalve and regular.

_A. myalis._ The Mya-like Anatina.

Species inequivalve.

_A. trapezoides._ The trapezium-shaped Anatina. Pl. 12, fig. 5.

Species with a moveable tooth or calcareous piece upon the right valve,
lodged in the angle formed by the spoonlike process.


                               FAMILY V.
                        MACTRACEA. Seven genera.


                      1. Lutraria. Eleven species.

This genus was taken from the Mactra, and is perfectly distinct, as it
wants the lateral teeth. It is called Lutricola by De Blainville, from
its lurking in sand or mud at the mouths of large rivers.

Shell inequilateral, orbicular, sub-triangular or transversely oval,
gaping at the extremities; hinge with one cardinal tooth folded in two,
or two teeth, one of which is plain, with an opposite hollow to receive
it; no lateral teeth; ligament interior and fixed in the hollow cavity
of the primary tooth.

                          Lutraria solenoides.
                          L. rugosa.
                          L. compressa.
                          L. piperata.
                          L. tellinoides.
                          L. elliptica.
                          L. papyracea.
                          L. plicatella.
                          L. crassiplica.
                          L. complanata.
                          L. candida.

_L. solenoides._ The Solen-like Lutraria.

Species oblong, sub-cylindrical, very gaping, two very strong cardinal
teeth; the spoonlike cavity of the ligament vertical.

_L. compressa._ The compressed Lutraria.

Species oval or orbicular, almost equilateral, very compressed, little
gaping; hinge similar; internal ligament inserted in the pit of a
vertical spoonlike cavity; two distinct tubes, without longitudinal
striæ.

_L. rugosa._ The rugged Lutraria.

Species ovate, closed at both ends; striæ from the summit to the base.

_L. elliptica._ The oval Lutraria.

Oblong oval, nearly smooth, having a few concentric striæ, and some
diagonal striæ at the ends of the valves; colour yellow or greenish
brown; inside white.

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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.

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