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
... retraction of the polypide . ( 5. ) Parietal Muscles . These are numerous , short but strong , and very evident fibres ( Pl . X , figs . 3 , 4 , v ) , which run transversely in the endocyst in small groups of two or three fibres each ...
... retraction of the polypide . ( 5. ) Parietal Muscles . These are numerous , short but strong , and very evident fibres ( Pl . X , figs . 3 , 4 , v ) , which run transversely in the endocyst in small groups of two or three fibres each ...
Página 29
... retracted state of the polypide , is scarcely at all bent , so that here its agency in exsertion is at once out of ... retraction is easily understood . Here the perigastric fluid being no * Observations on the Minute Structure of some ...
... retracted state of the polypide , is scarcely at all bent , so that here its agency in exsertion is at once out of ... retraction is easily understood . Here the perigastric fluid being no * Observations on the Minute Structure of some ...
Página 30
... retraction is complete , the sphincter closes the tentacular sheath , and the polypide rests secure in the recesses of the cell . The muscles of these animals are especially interesting in a physiological point of view , for they seem ...
... retraction is complete , the sphincter closes the tentacular sheath , and the polypide rests secure in the recesses of the cell . The muscles of these animals are especially interesting in a physiological point of view , for they seem ...
Página 36
... retraction . It is now no longer dependent for its growth on the general nutrition of the colony , but has become an independent zooid , obtaining its food from without , and submitting it to the action of its own digestive system . The ...
... retraction . It is now no longer dependent for its growth on the general nutrition of the colony , but has become an independent zooid , obtaining its food from without , and submitting it to the action of its own digestive system . The ...
Página 39
... retraction ; but the endocyst is colourless and transparent , and free from the earthy particles which in the greater number of species are after- wards formed in it , and the little animal is still simple . It loses no time , however ...
... retraction ; but the endocyst is colourless and transparent , and free from the earthy particles which in the greater number of species are after- wards formed in it , and the little animal is still simple . It loses no time , however ...
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 crescentic Cristatella Cristatella mucedo d'eau douce described Difflugia disc distinct Dumortier ectocyst Ehrenbergi 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 longitudinal lophophore Lophopus crystallinus margin Mém membrane memoir Meyen mouth Müller Naisa naturalists observed oesophagus 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