A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and Foreign, Tema 28 |
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Página 14
The structure of this body is remarkable ; it consists of a central mass ,
surrounded by a distinct layer of somewhat elongated cellules placed
perpendicularly to its surface . The body which thus closes up the centre of the
annular septum has ...
The structure of this body is remarkable ; it consists of a central mass ,
surrounded by a distinct layer of somewhat elongated cellules placed
perpendicularly to its surface . The body which thus closes up the centre of the
annular septum has ...
Página 16
24 , d ) is a simple edentulous orifice of a circular or slightly crescentic form ,
placed in the centre of the body of the lophophore , and consequently occupying
the bottom of the tentacular crater . Its margin is slightly elevated , and is
continuous ...
24 , d ) is a simple edentulous orifice of a circular or slightly crescentic form ,
placed in the centre of the body of the lophophore , and consequently occupying
the bottom of the tentacular crater . Its margin is slightly elevated , and is
continuous ...
Página 18
If a polypide of Plumatella repens be watched while in an exserted state ,
different kinds of Infusoria and other minute organic bodies may be observed to
be whirled along in the vortices caused by the action of the tentacular cilia , and ...
If a polypide of Plumatella repens be watched while in an exserted state ,
different kinds of Infusoria and other minute organic bodies may be observed to
be whirled along in the vortices caused by the action of the tentacular cilia , and ...
Página 21
The concave margin of the body of the lophophore is raised into a kind of
thickened rim , which arches over the mouth , so as to constitute an epistome
thickly ciliated on its oral aspect , but not provided with muscles like the epistome
of the ...
The concave margin of the body of the lophophore is raised into a kind of
thickened rim , which arches over the mouth , so as to constitute an epistome
thickly ciliated on its oral aspect , but not provided with muscles like the epistome
of the ...
Página 28
... cause than the consequent pressure of the perigastric fluid against the body of
the polypide , and the necessary compulsion of the latter to move in the direction
of least resistance , or through the orifice of the cell ; for the mere straightening ...
... cause than the consequent pressure of the perigastric fluid against the body of
the polypide , and the necessary compulsion of the latter to move in the direction
of least resistance , or through the orifice of the cell ; for the mere straightening ...
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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 Species ... George James Allman Sin vista previa disponible - 2009 |
Términos y frases comunes
adherent admit Alcyonella alimentary alimentary canal Allman already anatomy animal appearance Ascidian attached become Beneden bodies branches branchial British cænæcium canal cavity cell character cilia closely complete condition connected consists constitutes contained continuous corresponding 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 important internal latter layer Leidy lophophore Lophopus margin mass Mém membrane memoir minute mouth muscles Natural naturalists nearly observed occur organs orifice Original figures Paludicella passes Plumatella Plumatella repens Polype polypide Polyzoon portion present published relations repens resemblance retraction retractor Rösel seen separated sheath side space species specimens statoblasts stomach 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 | Biblioteca Nacional de Austria |
| Digitalizado | 12 Mayo 2011 |
| Largo | 119 páginas |
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