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 7
... to our ideal Polyzoon , we may bear in mind that the immediately investing sac has the power , in almost every case , of secreting from its external surface a secondary investment of very various constitution in the 7.
... to our ideal Polyzoon , we may bear in mind that the immediately investing sac has the power , in almost every case , of secreting from its external surface a secondary investment of very various constitution in the 7.
Página 8
Including All the Known Species, Both British and Foreign George James Allman. surface a secondary investment of very various constitution in the different groups ; and we may , moreover , conceive of the entire animal with its digestive ...
Including All the Known Species, Both British and Foreign George James Allman. surface a secondary investment of very various constitution in the different groups ; and we may , moreover , conceive of the entire animal with its digestive ...
Página 12
... surface , where they constitute a well - marked layer composed of a network of transverse and longitudinal fibres over the whole extent of the endocyst . I have even succeeded in separating this network as a continuous layer . There can ...
... surface , where they constitute a well - marked layer composed of a network of transverse and longitudinal fibres over the whole extent of the endocyst . I have even succeeded in separating this network as a continuous layer . There can ...
Página 14
... surface ( Pl . X , fig . 4 , b ' ) . The septum thus formed is rendered complete by the aperture in its centre being closed by a peculiar body , which projects into the cavity of the cell at each side . The structure of this body is ...
... surface ( Pl . X , fig . 4 , b ' ) . The septum thus formed is rendered complete by the aperture in its centre being closed by a peculiar body , which projects into the cavity of the cell at each side . The structure of this body is ...
Página 16
... surface with vibratile cilia , while those which look towards the vent are thin , membranous , and transparent , and destitute of cilia . It may be observed , when the polypide is exserted from its cell , to be in a constant motion ...
... surface with vibratile cilia , while those which look towards the vent are thin , membranous , and transparent , and destitute of cilia . It may be observed , when the polypide is exserted from its cell , to be in a constant motion ...
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