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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.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

Shell often sinistral, oval, oblong, or globular, perfectly smooth;
aperture oval, contracted posteriorly; the right edge sharp, advanced
above the plane of the left edge; columella twisting obliquely, and
enlarging to join itself to the anterior part of the columellar margin.

                            Physa castanea.
                            P. fontinalis.
                            P. hypnorum.
                            P. subopaca.

_P. fontinalis._ The fountain Physa. Pl. 20, fig. 2.

Volutions reversed, oval, ventricose, pellucid, horn-coloured; spire
short and acute.


                       3. Lymnæa. Eleven species.

Shell aquatic, oval, turreted or conical, thin, smooth, spire pointed;
aperture oval, entire; edges disunited, the left with a very oblique
plait at the point of junction of the columella with the rest of the
margin.

                           Lymnæa stagnalis.
                           L. palustris.
                           L. Virginiana.
                           L. luteola.
                           L. acuminata.
                           L. auricularia.
                           L. ovata.
                           L. peregra.
                           L. intermedia.
                           L. leucostoma.
                           L. minuta.

_L. stagnalis._ The pond Lymnæa. Pl. 20, fig. 1.

Ovate, ventricose; spire subulate and very acute; aperture large and
ovate; horn coloured.

_L. leucostoma._ The shining Lymnæa.

Species sub-turreted, with the right edge thickened.


                               FAMILY IX.
                        MELANIDES. Three genera.


                      1. Melania. Sixteen species.

Likewise taken from the Helix of Linnæus.

Shell fluviatile, covered with epidermis, oval, oblong; spire slightly
pointed, more or less turreted; the margin of the whorls often
surmounted by spires; aperture oval, entire; columella smooth and
arched; closed by a thin, horny, complete operculum.

                           Melania asperata.
                           M. truncata.
                           M. coarctata.
                           M. punctata.
                           M. corrugata.
                           M. subulata.
                           M. lævigata.
                           M. clavus.
                           M. decollata.
                           M. amarula.
                           M. thiarella.
                           M. spinulosa.
                           M. granifera.
                           M. carinifera.
                           M. truncatula.
                           M. fasciolata.

_M. amarula._ The crowned Melania. Pl. 20, fig. 3.

Covered with a black epidermis, under which the colour is deep chestnut;
ovate oblong, with the whorls transversely keeled and coronated with
triangular tubercles, from which emanate ciliated spines.


                     2. Melanopsis. Three species.

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

Opening the text

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.

Wyatt, Thomas

Mollusks

Shell often sinistral, oval, oblong, or globular, perfectly smooth;
aperture oval, contracted posteriorly; the right edge sharp, advanced
above the plane of the left edge; columella twisting obliquely, and
enlarging to join itself to the anterior part of the columellar margin.

                            Physa castanea.
                            P. fontinalis.
                            P. hypnorum.
                            P. subopaca.

_P. fontinalis._ The fountain Physa. Pl. 20, fig. 2.

Volutions reversed, oval, ventricose, pellucid, horn-coloured; spire
short and acute.


                       3. Lymnæa. Eleven species.

Shell aquatic, oval, turreted or conical, thin, smooth, spire pointed;
aperture oval, entire; edges disunited, the left with a very oblique
plait at the point of junction of the columella with the rest of the
margin.

                           Lymnæa stagnalis.
                           L. palustris.
                           L. Virginiana.
                           L. luteola.
                           L. acuminata.
                           L. auricularia.
                           L. ovata.
                           L. peregra.
                           L. intermedia.
                           L. leucostoma.
                           L. minuta.

_L. stagnalis._ The pond Lymnæa. Pl. 20, fig. 1.

Ovate, ventricose; spire subulate and very acute; aperture large and
ovate; horn coloured.

_L. leucostoma._ The shining Lymnæa.

Species sub-turreted, with the right edge thickened.


                               FAMILY IX.
                        MELANIDES. Three genera.


                      1. Melania. Sixteen species.

Likewise taken from the Helix of Linnæus.

Shell fluviatile, covered with epidermis, oval, oblong; spire slightly
pointed, more or less turreted; the margin of the whorls often
surmounted by spires; aperture oval, entire; columella smooth and
arched; closed by a thin, horny, complete operculum.

                           Melania asperata.
                           M. truncata.
                           M. coarctata.
                           M. punctata.
                           M. corrugata.
                           M. subulata.
                           M. lævigata.
                           M. clavus.
                           M. decollata.
                           M. amarula.
                           M. thiarella.
                           M. spinulosa.
                           M. granifera.
                           M. carinifera.
                           M. truncatula.
                           M. fasciolata.

_M. amarula._ The crowned Melania. Pl. 20, fig. 3.

Covered with a black epidermis, under which the colour is deep chestnut;
ovate oblong, with the whorls transversely keeled and coronated with
triangular tubercles, from which emanate ciliated spines.


                     2. Melanopsis. Three species.

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.

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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