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 28
... Paludicella , I have not succeeded in detecting them here as distinct fasciculi , and I prefer viewing the " superior tube - retractors " of Hancock as some of the posterior fibres of the anterior parieto - vaginal muscles . The action ...
... Paludicella , I have not succeeded in detecting them here as distinct fasciculi , and I prefer viewing the " superior tube - retractors " of Hancock as some of the posterior fibres of the anterior parieto - vaginal muscles . The action ...
Página 29
... Paludicella , the œsophagus , in the retracted state of the polypide , is scarcely at all bent , so that here its agency in exsertion is at once out of the question . Let us suppose the polypide withdrawn into the recesses of the cell ...
... Paludicella , the œsophagus , in the retracted state of the polypide , is scarcely at all bent , so that here its agency in exsertion is at once out of the question . Let us suppose the polypide withdrawn into the recesses of the cell ...
Página 30
... Paludicella drawing after it as it descends that portion of the endocyst which had been carried out during protrusion ; in the other genera , however , the anterior muscles would seem to take no part in this act . When the retraction is ...
... Paludicella drawing after it as it descends that portion of the endocyst which had been carried out during protrusion ; in the other genera , however , the anterior muscles would seem to take no part in this act . When the retraction is ...
Página 31
... Paludicella , in which I have not as yet been able to effect any satisfactory demonstration of its existence . In the phylactolæmatous species , there may be seen attached to the external surface of the œsophagus , on its rectal aspect ...
... Paludicella , in which I have not as yet been able to effect any satisfactory demonstration of its existence . In the phylactolæmatous species , there may be seen attached to the external surface of the œsophagus , on its rectal aspect ...
Página 32
... Paludicella , I have succeeded in making a careful examination of the generative system . In each of these both ovary and testis are found in the same cell . * During the months of July and August there may frequently be seen in the ...
... Paludicella , I have succeeded in making a careful examination of the generative system . In each of these both ovary and testis are found in the same cell . * During the months of July and August there may frequently be seen in 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