A Monograph of the Freshwater Polyzoa, Including All the Known Species, Both British and Foreign |
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Página 2
... a term which up to the present day has been in general adoption. It was just at
this time that Abraham Trembley was engaged in his famous experiments on the
Hydra, which Leeuwenhock had originally discovered, attached to the leaves of ...
... a term which up to the present day has been in general adoption. It was just at
this time that Abraham Trembley was engaged in his famous experiments on the
Hydra, which Leeuwenhock had originally discovered, attached to the leaves of ...
Página 10
... of cell destitute of moveable appendage. CycLostomATA (marine).
GYMNOLAEMATA.f Polypide completely retractile; evagination perfect; a circle of
setae attached to the ininvertible portion, and acting as an operculum in the
retracted state.
... of cell destitute of moveable appendage. CycLostomATA (marine).
GYMNOLAEMATA.f Polypide completely retractile; evagination perfect; a circle of
setae attached to the ininvertible portion, and acting as an operculum in the
retracted state.
Página 11
7; X, fig. 4, a) lines the interior of the cells, and when it arrives at their apertures
would protrude beyond the ectocyst were it not that it here becomes invaginated
or inverted into itself, and then terminates by being attached round the base of
the ...
7; X, fig. 4, a) lines the interior of the cells, and when it arrives at their apertures
would protrude beyond the ectocyst were it not that it here becomes invaginated
or inverted into itself, and then terminates by being attached round the base of
the ...
Página 12
In the midst of this a minute vacuola next shows itself; this becomes the cell-cavity
, and gradually increases in size with the enlarging cell; the nucleus is persistent,
remaining attached to the cell-wall. For reasons to be presently mentioned, it is ...
In the midst of this a minute vacuola next shows itself; this becomes the cell-cavity
, and gradually increases in size with the enlarging cell; the nucleus is persistent,
remaining attached to the cell-wall. For reasons to be presently mentioned, it is ...
Página 14
The part of the ectocyst to which the ribs are attached is carried inwards during
extreme retraction of the polypide. These ribs I look upon as the true homologue
of the selae which crown the cell in Bowerbankia and other ctenostomatous ...
The part of the ectocyst to which the ribs are attached is carried inwards during
extreme retraction of the polypide. These ribs I look upon as the true homologue
of the selae which crown the cell in Bowerbankia and other ctenostomatous ...
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A Monograph of the Fresh-water Polyzoa: Including All the Known ..., Tema 28 George James Allman Vista de fragmentos - 1856 |
A Monograph of the Fresh-water Polyzoa: Including All the Known ..., Tema 28 George James Allman Vista de fragmentos - 1856 |
Términos y frases comunes
adherent admit Alcyonella alimentary alimentary canal Allman already anatomy animal appearance attached become Beneden bodies branches branchial British canal cavity cell characters cilia closely coenoecium complete condition connected consists constitutes contained continuous Cristatella crown described detected disc distinct Dumortier ectocyst edit endocyst entire epistome examined existence extending external extremity fibres fluid Fredericella fresh-water Polyzoa genera genus Gervais gives Hist important internal latter layer Leidy lophophore Lophopus margin mass Mém membrane memoir minute mouth muscles Natural naturalists nearly observed occur organ orifice Original figures Paludicella passes Plumatella Plumatella repens Polype polypide Polyzoon portion present published relations repens resemblance retraction retractor seen separated sheath side space species specimens statoblasts stomach stones structure surface surrounding tentacula transparent transverse Trembley true tubes Tubularia tunic Tunicata walls whole young
Información bibliográfica
| Título | A Monograph of the Freshwater Polyzoa, Including All the Known Species, Both British and Foreign Volumen18 de ¬The Ray Society |
| Autor | George James Allman |
| Editor | Ray Society, 1856 |
| Procedencia del original | la Biblioteca Estatal de Baviera |
| Digitalizado | 13 Nov. 2009 |
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