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
... Exserted . Fig . 2. Retracted . a . Region of mouth , surrounded by tentacles . b . Alimentary canal . c . Anus . d . Nervous ganglion . e . Membranous investing sac . f . Testis . f ' . Ovary . g . Retractor muscle . Let us imagine an ...
... Exserted . Fig . 2. Retracted . a . Region of mouth , surrounded by tentacles . b . Alimentary canal . c . Anus . d . Nervous ganglion . e . Membranous investing sac . f . Testis . f ' . Ovary . g . Retractor muscle . Let us imagine an ...
Página 16
... exserted from its cell , to be in a constant motion , which consists in an alternate elevation and depression of the organ . The elevation is effected by distinct muscular fibres ( n ) , which are visible through the transparent walls ...
... exserted from its cell , to be in a constant motion , which consists in an alternate elevation and depression of the organ . The elevation is effected by distinct muscular fibres ( n ) , which are visible through the transparent walls ...
Página 18
... exserted state , different kinds of Infusoria and other minute organic bodies may be observed to be whirled along in the vortices caused by the action of the tentacular cilia , and conveyed to the mouth , where many of them are at once ...
... exserted state , different kinds of Infusoria and other minute organic bodies may be observed to be whirled along in the vortices caused by the action of the tentacular cilia , and conveyed to the mouth , where many of them are at once ...
Página 24
... exserted state of the polypide ( Pl . IV , fig . 4 ) ; on other parts of the endocyst I have not succeeded in detecting them by direct observation ; but the peculiar acceleration which the motion of the circulating corpuscles ...
... exserted state of the polypide ( Pl . IV , fig . 4 ) ; on other parts of the endocyst I have not succeeded in detecting them by direct observation ; but the peculiar acceleration which the motion of the circulating corpuscles ...
Página 28
... exserted state of the polypide . The marine Polyzoa certainly afford an analogy for the existence of these muscles ... exsertion . ( 3. ) Posterior Parieto - vaginal Muscles . These are about four thin fasciculi ( Pl . X , figs . 3 , 4 ...
... exserted state of the polypide . The marine Polyzoa certainly afford an analogy for the existence of these muscles ... exsertion . ( 3. ) Posterior Parieto - vaginal Muscles . These are about four thin fasciculi ( Pl . X , figs . 3 , 4 ...
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