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Je confidere le fommet quant à fa grandeur comparée à celle de SOMMET. l'ouverture de la Coquille. 1o. Il peut manquer ou n'être pas fenfible. 2°. Il peut être plus court que l'ouverture. 3°. Il peut être égal à elle. 4°. Enfin il peut la furpaffer en longueur.

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On peut obferver trois chofes dans l'ouverture; 1o, fa forme; 2o. fon canal; 3°. fes lèvres ou fes bords.

3°. OUVERTU

RE.

Limaçons

10. Figure de l'ouverture.

-Limaçons -

dont l'ouverture dont l'ouverture Limaçons à ouverture elliptique Limaçons à ouverture allongée. eft exactement eft en demi-lu

ou ovale.

ronde.

ne.

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Goffon.

Melar.

[blocks in formation]

Sormet. pl. 1. Jamar. pl. 6. Popel. pl. 10. Majet. pl. 4. Pouchet. pl. 1.

Cerite.

dans leur vieilleffe.

Lupon.

[blocks in formation]

Bitou.

Porcelaine. pl. 4.

OPERCULÉS.. Fafin. pl. 7. Saburon.

Narel.

[blocks in formation]

Simeri. pl. 5. Egouen.

Covet. pl. 8.
Miga.

[blocks in formation]

Stipon.

Bobi.

Totombo.

Kambeul.

Chotin.

Ligar.

[blocks in formation]
[blocks in formation]
[blocks in formation]

Salar.

Liri.

Vermet. pl.11. Siger.

pl. 9.

[blocks in formation]

Soron.

Sakem. pl. 7. Lifpe.

Sirat.

Staron.

Bolin.

Gadin.

Labarin.

Dofan.

Kalan.

[blocks in formation]

L'opercule peut être confidéré quant à sa substance & quant à fa

OPERCULE.

figure.

[blocks in formation]

Sormet. pl. 1. Miran. pl. 4. Jamar. pl. 6. Jatou. pl. 9. Vermet. pl. 11. Gochet. pl. 13.

Goffon.

Rafel.

Melar.

Cofar

[blocks in formation]

Lifpe.
Dofan.

Dunar.
Tadin.

[blocks in formation]
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