A Monograph of the Freshwater Polyzoa, Including All the Known Species, Both British and Foreign |
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Página 13
In some species of Plumatella, and in Alcyonella flabellum and A. Benedeni, the
earthy particles are entirely absent, from a longitudinal line which commences
wide near the aperture of the cell, and gradually narrows as it passes backwards,
...
In some species of Plumatella, and in Alcyonella flabellum and A. Benedeni, the
earthy particles are entirely absent, from a longitudinal line which commences
wide near the aperture of the cell, and gradually narrows as it passes backwards,
...
Página 15
In Alcyonella sun/osa, and in Fredericella sultana, imperfect septa may here and
there be observed, while Crissatella and Lophopus would seem to be quite
deprived of them, the cells in these genera all opening into one another. The
ectocyst ...
In Alcyonella sun/osa, and in Fredericella sultana, imperfect septa may here and
there be observed, while Crissatella and Lophopus would seem to be quite
deprived of them, the cells in these genera all opening into one another. The
ectocyst ...
Página 16
... who asserts that he has seen in Alcyonella a gizzard with an organization
precisely similar to that of Bowerbankia.” The stomach is a large thick-walled sac,
and may be divided into two portions, first a nearly cylindrical prolongation (Pl. V,
fig.
... who asserts that he has seen in Alcyonella a gizzard with an organization
precisely similar to that of Bowerbankia.” The stomach is a large thick-walled sac,
and may be divided into two portions, first a nearly cylindrical prolongation (Pl. V,
fig.
Página 17
... and are probably muscular fibres; they are particularly evident in Alcyonella
and Plumatella towards the fundus of the stomach; they become less distinct as
we ascend toward the oesophagus, and totally disappear 3 DIGESTIVE SYSTEM
.
... and are probably muscular fibres; they are particularly evident in Alcyonella
and Plumatella towards the fundus of the stomach; they become less distinct as
we ascend toward the oesophagus, and totally disappear 3 DIGESTIVE SYSTEM
.
Página 19
... a series of tentacula () which are borne upon the margin of the lophophore.
The lophophore is throughout almost the entire class of an orbicular figure; but in
the fresh-water genera Cristatella, Lophopus, Plumatella, and Alcyonella, its
neural ...
... a series of tentacula () which are borne upon the margin of the lophophore.
The lophophore is throughout almost the entire class of an orbicular figure; but in
the fresh-water genera Cristatella, Lophopus, Plumatella, and Alcyonella, its
neural ...
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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 |
| Exportar cita | BiBTeX EndNote RefMan |