A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and Foreign, Tema 28 |
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Página 7
Retracted . a . Region of mouth , surrounded by tentacles . 6. Alimentary canal . c
. Anus . d . Nervous ganglion . e . ... being retracted or protruded according to the
will of the animal , the retraction being accompanied by an invagination of the ...
Retracted . a . Region of mouth , surrounded by tentacles . 6. Alimentary canal . c
. Anus . d . Nervous ganglion . e . ... being retracted or protruded according to the
will of the animal , the retraction being accompanied by an invagination of the ...
Página 8
The cells are the little chambers of which the cænæcium is made up , and in each
of which a polypide is lodged . The part of the cell through which the polypide
admits of protrusion and retraction is the orifice of the cell . 1 1 * [ Πολυπούς ,
είδος ...
The cells are the little chambers of which the cænæcium is made up , and in each
of which a polypide is lodged . The part of the cell through which the polypide
admits of protrusion and retraction is the orifice of the cell . 1 1 * [ Πολυπούς ,
είδος ...
Página 10
Polypide completely retractile ; evagination perfect ; a circle of setæ attached to
the ininvertible portion , and acting as an operculum in the retracted state .
CTENOSTOMATA ( marine ) . Polypide completely retractile ; evagination perfect
...
Polypide completely retractile ; evagination perfect ; a circle of setæ attached to
the ininvertible portion , and acting as an operculum in the retracted state .
CTENOSTOMATA ( marine ) . Polypide completely retractile ; evagination perfect
...
Página 11
It must not , however , be supposed that there is here any proper orifice , the
retraction and exsertion consisting merely in an invagination and evagination of
the anterior part of the cell . The cænæcium , in every case , except in Cristatella ,
is ...
It must not , however , be supposed that there is here any proper orifice , the
retraction and exsertion consisting merely in an invagination and evagination of
the anterior part of the cell . The cænæcium , in every case , except in Cristatella ,
is ...
Página 12
... till it terminates by being attached to the base of the tentacular crown . This thin
, non - contractile portion of the endocyst constitutes the tentacular sheath which
encloses and protects the tentacula during the retracted state of the polypide .
... till it terminates by being attached to the base of the tentacular crown . This thin
, non - contractile portion of the endocyst constitutes the tentacular sheath which
encloses and protects the tentacula during the retracted state of the polypide .
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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 cænæcium 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