A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and Foreign |
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Página 11
In every instance * the polypide can be protruded from its cell , and again withdrawn into it , and the part through which it thus passes outwards and inwards , as has already been defined , is the orifice of the cell .
In every instance * the polypide can be protruded from its cell , and again withdrawn into it , and the part through which it thus passes outwards and inwards , as has already been defined , is the orifice of the cell .
Página 12
... passes into the 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 ...
... passes into the 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 ...
Página 13
... and gradually narrows as it passes backwards , when it soon assumes the appearance of a prominent keel , and then loses its transparency by the deposition of earthy matter , as in the rest of the ectocyst ( Pl . VIII , figs .
... and gradually narrows as it passes backwards , when it soon assumes the appearance of a prominent keel , and then loses its transparency by the deposition of earthy matter , as in the rest of the ectocyst ( Pl . VIII , figs .
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 20
This membrane passes uninterruptedly from the extremity of one arm of the lophophore to that of the other , thus binding together the two tentacula which spring from the points of the arms , and completing the tentacular crater so as ...
This membrane passes uninterruptedly from the extremity of one arm of the lophophore to that of the other , thus binding together the two tentacula which spring from the points of the arms , and completing the tentacular crater so as ...
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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 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
Información bibliográfica
| Título | A Monograph of the Fresh-water 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 |
| Largo | 119 páginas |
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