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 12
... longitudinal fibres over the whole extent of the endocyst . I have even succeeded in separating this network as a continuous layer . There can be no doubt that these fibres of the endocyst are muscular , and that it is to their presence ...
... longitudinal fibres over the whole extent of the endocyst . I have even succeeded in separating this network as a continuous layer . There can be no doubt that these fibres of the endocyst are muscular , and that it is to their presence ...
Página 13
... longitudinal line which commences wide near the aperture of the cell , 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 ...
... longitudinal line which commences wide near the aperture of the cell , 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 ...
Página 14
... longitudinal horny ribs ( Pl . X , fig . 3 , b ' ) . The part of the ectocyst to which the ribs are attached is carried inwards during extreme retraction of the polypide . These ribs I look upon as the true homologue of the set which ...
... longitudinal horny ribs ( Pl . X , fig . 3 , b ' ) . The part of the ectocyst to which the ribs are attached is carried inwards during extreme retraction of the polypide . These ribs I look upon as the true homologue of the set which ...
Página 17
... longitudinal rugæ . These rugæ become less decided towards the fundus of the stomach , and in Paludicella they are entirely absent . This internal layer is composed of easily separable spherical cells ( Pl . II , figs . 6 , 7 ) ...
... longitudinal rugæ . These rugæ become less decided towards the fundus of the stomach , and in Paludicella they are entirely absent . This internal layer is composed of easily separable spherical cells ( Pl . II , figs . 6 , 7 ) ...
Página 18
... longitudinal rugæ and deep brown colour of the internal layer of the stomach nearly disappear in it , and , during the process of digestion , we may perceive that the peculiar peristaltic action of the walls is more marked in it than in ...
... longitudinal rugæ and deep brown colour of the internal layer of the stomach nearly disappear in it , and , during the process of digestion , we may perceive that the peculiar peristaltic action of the walls is more marked in it than in ...
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