A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and Foreign, Tema 28 |
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Página 22
It is simply this portion of the cell become so much constricted as to be no longer
capable of containing the polypide , which is in consequence pushed onwards
into the wider portion which now constitutes the proper cell . . The muscles of the
...
It is simply this portion of the cell become so much constricted as to be no longer
capable of containing the polypide , which is in consequence pushed onwards
into the wider portion which now constitutes the proper cell . . The muscles of the
...
Página 24
I have , however , most distinctly seen them on the inner surface of the upper part
of the tentacular sheath in certain species during the exserted state of the
polypide ( Pl . IV , fig . 4 ) ; on other parts of the endocyst I have not succeeded in
...
I have , however , most distinctly seen them on the inner surface of the upper part
of the tentacular sheath in certain species during the exserted state of the
polypide ( Pl . IV , fig . 4 ) ; on other parts of the endocyst I have not succeeded in
...
Página 26
Though a contraction of the endocyst at this spot , as if occasioned by the action
of a powerful sphincter , may be always observed when the polypide is
completely retracted , yet the demonstration of an actual muscle is by no means
easy .
Though a contraction of the endocyst at this spot , as if occasioned by the action
of a powerful sphincter , may be always observed when the polypide is
completely retracted , yet the demonstration of an actual muscle is by no means
easy .
Página 27
By their action they evidently constrict the endocyst in a transverse direction , and
thus aid in the protrusion of the polypide . A muscular tissue is also very evident
in the walls of the stomach ; this has already been described in connection with ...
By their action they evidently constrict the endocyst in a transverse direction , and
thus aid in the protrusion of the polypide . A muscular tissue is also very evident
in the walls of the stomach ; this has already been described in connection with ...
Página 28
or anterior to them when the tube is evaginated during the exserted state of the
polypide . The marine Polyzoa certainly afford an analogy for the existence of
these muscles ; but , though I have carefully sought for them in Paludicella , I
have ...
or anterior to them when the tube is evaginated during the exserted state of the
polypide . The marine Polyzoa certainly afford an analogy for the existence of
these muscles ; but , though I have carefully sought for them in Paludicella , I
have ...
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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 canal Allman already anatomy animal appearance Ascidian attached become Beneden bodies branches branchial British cćnćcium cavity cell character cilia closely complete condition connected consists constitutes contained continuous corresponding Cristatella 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 represented resemblance retraction retractor Rösel 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 Fresh-water Polyzoa: Including All the Known Species, Both British and Foreign, Tema 28 A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and Foreign, George James Allman Volumen13 de DE-601)130488305: Ray Society Publications, Ray Society Ray Society, Ray Society Volumen28 de Ray society ... [Publications |
| Autor | George James Allman |
| Editor | Ray Society, 1856 |
| Procedencia del original | la Biblioteca Estatal de Baviera |
| Digitalizado | 13 Nov. 2009 |
| Largo | 119 páginas |
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