A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and Foreign |
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Página 10
Poly pide completely retractile ; evagination of tentacular sheath imperfect . PALUDICELLEA ( fresh - water ) . or Lophophore orbicular , nearly so ; no epistome . Polypide completely retractile ; evagination perfect ; orifice of cell ...
Poly pide completely retractile ; evagination of tentacular sheath imperfect . PALUDICELLEA ( fresh - water ) . or Lophophore orbicular , nearly so ; no epistome . Polypide completely retractile ; evagination perfect ; orifice of cell ...
Página 12
... tentacular sheath , there appears to exist , at least in Lophopus , a circular canal , which here passes transversely round the endocyst . The presence of this canal is revealed by peculiar , spherical or oval , brilliant corpuscles ...
... tentacular sheath , there appears to exist , at least in Lophopus , a circular canal , which here passes transversely round the endocyst . The presence of this canal is revealed by peculiar , spherical or oval , brilliant corpuscles ...
Página 17
The intestine is very wide at its origin , and passes up along the side of the cardiac cavity and ćsophagus , rapidly diminishing in diameter till it terminates in a distinct anus by perforating the tentacular sheath just below the ...
The intestine is very wide at its origin , and passes up along the side of the cardiac cavity and ćsophagus , rapidly diminishing in diameter till it terminates in a distinct anus by perforating the tentacular sheath just below 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 ...
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 ...
Página 26
Their action steadies the sheath , and regulates its position during ... 6 , u ) surrounding the termination of the invaginated endocyst at the point where the latter passes into the tentacular sheath . Though a contraction of the ...
Their action steadies the sheath , and regulates its position during ... 6 , u ) surrounding the termination of the invaginated endocyst at the point where the latter passes into the tentacular sheath . Though a contraction of the ...
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Otras ediciones - Ver todas
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 cćnćcium canal 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 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