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The Conchologist's First Book: A System of Testaceous Malacology, Arranged Expressly for the Use of Schools, in Which the Animals, According to Cuvier, Are Given With the Shells, a Great Number of New Species Added, and the Whole Brought Up, as Accurately as Possible, to the Present Condition of the Science.Poe, Edgar Allan

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The Conchologist's First Book: A System of Testaceous Malacology, Arranged Expressly for the Use of Schools, in Which the Animals, According to Cuvier, Are Given With the Shells, a Great Number of New Species Added, and the Whole Brought Up, as Accurately as Possible, to the Present Condition of the Science.

Name: The Conchologist's First Book: A System of Testaceous Malacology, Arranged Expressly for the Use of Schools, in Which the Animals, According to Cuvier, Are Given With the Shells, a Great Number of New Species Added, and the Whole Brought Up, as Accurately as Possible, to the Present Condition of the Science.
Author: Poe, Edgar Allan

Poe, Edgar Allan

Mollusks

NERITACEA. Four genera.


                      1. Genus _Neritina_. Pl. X.

_Animal._ Globular; foot circular, thick, without a furrow anteriorly,
or a lobe for the operculum posteriorly, with a bipartite columellar
muscle; conical tentacula; eyes subpedunculate at their external side;
mouth without labial tooth, but with a denticulated tongue prolonged
into the visceral cavity; a single large pectiniform branchia.

_Shell._ This genus was formerly classed with the Nerita, which in form
it much resembles, but from the circumstance of the latter inhabiting
the sea, and Neritinæ fresh water, it now forms a separate genus. Thin,
smooth, or finely striated, in all the species known, the right side of
the aperture does not possess any crenulations or teeth; the operculum
is provided with a lateral tooth on one side. Some species are armed
with spines; aperture semicircular; left margin smooth and sharp; spire
imperfect, generally dissolved by the animal. Inhabits the fresh water
rivers of Europe. Twenty-seven species.

 Neritina perversa.
 N. pulligera.
 N. dubia.
 N. zebra.
 N. zigzag.
 N. gagates.
 N. lugubris.
 N. lineolata.
 N. fasciata.
 N. semiconica.
 N. strigilata.
 N. meleagris.
 N. virginea.
 N. fluviatilis.
 N. viridis.
 N. Bætica.
 N. careosa.
 N. caffra.
 N. Domingensis.
 N. auriculata.
 N. crepidularia.
 N. brevispina.
 N. Smithii.
 N. spinosa.
 N. Oweni.
 N. pulchella.
 N. corona.


                       2. Genus _Nerita_. Pl. X.

_Animal._ See Neritina.

_Shell._ Marine, but never spined, solid, semiglobular, flattened
beneath, not imbilicated; aperture large, entire, semilunar, the
external margin much hollowed; the columella sharp and often dentated,
operculum horny, subspiral, with a projecting tooth. Inhabits the seas
of S. America and W. Indies. Twenty species.

 Nurita exuvia.
 N. textilis.
 N. undata.
 N. peloronta.
 N. chlorostoma.
 N. atrata.
 N. polita.
 N. albicella.
 N. chamæleon.
 N. versicolor.
 N. lineata.
 N. scabricosta.
 N. plicata.
 N. tassellata.
 N. signata.
 N. ornata.
 N. Australis.
 N. rudis.
 N. Ascensionis.
 N. Malaccensis.


                      3. Genus _Navicella_. Pl. X.

_Animal._ Oval, not spiral, foot elliptical, very large, with a thin
subpapillary edge, advanced rather anteriorly, without marginal furrow,
but attached on each side to the visceral mass in all its posterior
portion so as to form a sort of cavity open transversely behind; head
very broad and semilunate; tentacula conical, contractile and distant;
eyes subpedunculated at the external root of the tentacula; mouth large
and longitudinal.

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