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 49
... branchial sac along the hæmal side , in the region of the thoracic sinus , and in its therefore not admitting of eversion . In the Polyzoa there is , properly speaking , but one external orifice , namely , that through which the ...
... branchial sac along the hæmal side , in the region of the thoracic sinus , and in its therefore not admitting of eversion . In the Polyzoa there is , properly speaking , but one external orifice , namely , that through which the ...
Página 50
... branchial sac , or of any form of gill , || this chamber is not divided into a branchial and cloacal portion , and has only a single external orifice . The mouth opens into it below just as in the Ascidians , but the intestine , instead ...
... branchial sac , or of any form of gill , || this chamber is not divided into a branchial and cloacal portion , and has only a single external orifice . The mouth opens into it below just as in the Ascidians , but the intestine , instead ...
Página 51
... branchial sac and the third tunic of the Ascidia ; and it necessarily involves the supposition that the walls of this cavity wrap themselves round the pharynx in the manner of a serous sac , just as the serous lining of the pericardium ...
... branchial sac and the third tunic of the Ascidia ; and it necessarily involves the supposition that the walls of this cavity wrap themselves round the pharynx in the manner of a serous sac , just as the serous lining of the pericardium ...
Página 52
... branchial sac becomes perforated by four apertures , the first appearance of the branchial stigmata , and at the same time becomes detached , in the region of these apertures , from the walls of the thoracic chamber , which had ...
... branchial sac becomes perforated by four apertures , the first appearance of the branchial stigmata , and at the same time becomes detached , in the region of these apertures , from the walls of the thoracic chamber , which had ...
Página 53
... branchial sac of the Ascidian , becomes separated from it just as the branchial sac separates itself from the walls of the thoracic chamber of the Ascidian . The development of Salpa has been especially studied by Leuckart . * From the ...
... branchial sac of the Ascidian , becomes separated from it just as the branchial sac separates itself from the walls of the thoracic chamber of the Ascidian . The development of Salpa has been especially studied by Leuckart . * From the ...
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