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 19
... portions in the form of roundish pellets become separated at intervals from the mass , and are slowly propelled along the tube towards the anus , where , having arrived , they are suddenly ejected into the surrounding water and rapidly ...
... portions in the form of roundish pellets become separated at intervals from the mass , and are slowly propelled along the tube towards the anus , where , having arrived , they are suddenly ejected into the surrounding water and rapidly ...
Página 20
... portion of endocyst adherent to the bases of the tentacula and entering into the formation of the cup . d . Muscular fibres surrounding the margin of the cup . e . Mouth . f . Esophagus . g . Stomach . h . Rectum . i . Anus . k ...
... portion of endocyst adherent to the bases of the tentacula and entering into the formation of the cup . d . Muscular fibres surrounding the margin of the cup . e . Mouth . f . Esophagus . g . Stomach . h . Rectum . i . Anus . k ...
Página 21
... portion of the endocyst must then be viewed as adherent to the external portion externally , and to the tentacula ( and calyx ? ) internally . From this arrangement it is obvious , that the exsertion and retraction of the polypide must ...
... portion of the endocyst must then be viewed as adherent to the external portion externally , and to the tentacula ( and calyx ? ) internally . From this arrangement it is obvious , that the exsertion and retraction of the polypide must ...
Página 22
... portion of the cell become so much constricted as to be no longer capable of containing the polypide , which is in consequence pushed onwards into the wider portion which now constitutes the proper cell . The muscles of the stalk have ...
... portion of the cell become so much constricted as to be no longer capable of containing the polypide , which is in consequence pushed onwards into the wider portion which now constitutes the proper cell . The muscles of the stalk have ...
Página 23
... portions of the tissues separated by laceration . If it be admitted , as I think it must be , that the perigastric fluid consists mainly of water which has obtained entrance from without , it then corresponds to a true aquiferous system ...
... portions of the tissues separated by laceration . If it be admitted , as I think it must be , that the perigastric fluid consists mainly of water which has obtained entrance from without , it then corresponds to a true aquiferous system ...
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 cœnocium crescentic Cristatella Cristatella mucedo d'eau douce described Difflugia disc distinct Dumortier ectocyst 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 lophophore Lophopus crystallinus margin Mém membrane memoir Meyen mouth Müller Naisa naturalists observed œsophagus 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 Zoophytes