A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and Foreign, Tema 28Ray Society, 1856 - 119 páginas |
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Página 48
... branchial portion , and a posterior or cloacal portion . Now the main tube ... sac of the Ascidia passes immediately into the tentacular crown of the ... sac or test of the Tunicata corresponds to the external investment or ectocyst of ...
... branchial portion , and a posterior or cloacal portion . Now the main tube ... sac of the Ascidia passes immediately into the tentacular crown of the ... sac or test of the Tunicata corresponds to the external investment or ectocyst of ...
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 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 longitudinal 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