A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and ForeignRay Society, 1856 - 119 páginas |
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Página 10
... tentacular sheath imperfect . Polypide completely retractile ; evagination perfect ; orifice of cell destitute of move- able appendage . Polypide completely retractile ; evagination perfect ; a circle of setæ attached to the in ...
... tentacular sheath imperfect . Polypide completely retractile ; evagination perfect ; orifice of cell destitute of move- able appendage . Polypide completely retractile ; evagination perfect ; a circle of setæ attached to the in ...
Página 12
... 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 . Near the spot where the endocyst passes ...
... 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 . Near the spot where the endocyst passes ...
Página 17
... tentacular sheath just below the mouth , and at the concave side of the lophophore . b . Gymnolamata . In Paludicella articulata , the mouth ( Pl . X , fig . 5 ) is a perfectly circular orifice , with slightly projectile margin , and is ...
... tentacular sheath just below the mouth , and at the concave side of the lophophore . b . Gymnolamata . In Paludicella articulata , the mouth ( Pl . X , fig . 5 ) is a perfectly circular orifice , with slightly projectile margin , and is ...
Página 24
... 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 detecting them by direct observation ; but the peculiar acceleration which 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 detecting them by direct observation ; but the peculiar acceleration which the ...
Página 26
... tentacular sheath . 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 ...
... tentacular sheath . 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 ...
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 Alcyonella Alcyonella fungosa Alcyonella stagnorum alimentary canal Allman anatomy animal annulus Ascidian attached become Beneden Bowerbankia Brachiopoda branches branchial sac Brit Brux campanulata cavity cell cilia crescentic Cristatella Cristatella mucedo d'eau douce described Difflugia disc distinct Dumortier ectocyst Ehrenbergi embryo endocyst epistome exserted external fibres flabellum fluid fresh-water Polyzoa funiculus ganglion genera genus Gervais hæmal Hancock hippocrepian Hist homologous intestine invaginated l'Acad Lamarck layer Leidy Linnæus longitudinal lophophore Lophopus crystallinus margin Mém membrane memoir Meyen mouth Müller Naisa naturalists observed oesophagus organ orifice Original figures ovary ovum Paludicella parieto-vaginal muscles peculiar Pedicellina perigastric space Plumatella repens Polype à Panache polypide Polyzoon portion posterior present Raspail respiratory retraction retractor retractor muscles Rösel seen septa side species specimens statoblasts stomach structure surface tentacles tentacula tentacular crown tentacular sheath thoracic chamber transparent transverse Trembley tubes Tubularia repens tunic Tunicata Urnatella walls Zooph