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 35
... become directly continuous , while the cilia themselves disappear from the ciliated portion , and the entire sac becomes enveloped in an ectocyst , to constitute the cell of the adult polyzoon . The subsequent changes are produced by ...
... become directly continuous , while the cilia themselves disappear from the ciliated portion , and the entire sac becomes enveloped in an ectocyst , to constitute the cell of the adult polyzoon . The subsequent changes are produced by ...
Página 36
... become the ectocyst and endocyst of the future cell . By this time the gemma has become considerably elongated and has acquired a clavate form , and its cavity begins to be cut off from that of the parent - cell by the formation of a ...
... become the ectocyst and endocyst of the future cell . By this time the gemma has become considerably elongated and has acquired a clavate form , and its cavity begins to be cut off from that of the parent - cell by the formation of a ...
Página 53
... become the cloaca . The alimentary canal , about the same time , makes its appearance ; and it is not until a ... become that of the tentacular sheath in these animals . In the Polyzoa the development is continued by the shooting out ...
... become the cloaca . The alimentary canal , about the same time , makes its appearance ; and it is not until a ... become that of the tentacular sheath in these animals . In the Polyzoa the development is continued by the shooting out ...
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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