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 26
... occurs , and , though the presence of fibres is but obscurely indicated , I have no hesitation in viewing this structure as a sphincter muscle on which the contraction in question is dependent . The action of the sphincter closes the ...
... occurs , and , though the presence of fibres is but obscurely indicated , I have no hesitation in viewing this structure as a sphincter muscle on which the contraction in question is dependent . The action of the sphincter closes the ...
Página 30
... occurred in a plane perpendicular to the axis of the fibre , never presenting an uneven or lacerated surface , and a ... occurring in the endocyst ( parietal muscles ) are composed of very distinct fusiform nucleated cells 30 MUSCULAR ...
... occurred in a plane perpendicular to the axis of the fibre , never presenting an uneven or lacerated surface , and a ... occurring in the endocyst ( parietal muscles ) are composed of very distinct fusiform nucleated cells 30 MUSCULAR ...
Página 35
... occur without any very regular order near the orifice of the cell . In Cristatella the gemmæ are produced very regularly from constant points on the sides of the previously existing cells , and the new cells thus produced remaining in ...
... occur without any very regular order near the orifice of the cell . In Cristatella the gemmæ are produced very regularly from constant points on the sides of the previously existing cells , and the new cells thus produced remaining in ...
Página 36
... occurs in the new cell just over the tenta- cular crown of the polypide , and the last stage of development is entered on . The tentacular crown rapidly acquires its complete form , the inferior extremity of the alimentary canal becomes ...
... occurs in the new cell just over the tenta- cular crown of the polypide , and the last stage of development is entered on . The tentacular crown rapidly acquires its complete form , the inferior extremity of the alimentary canal becomes ...
Página 37
... occur at certain seasons , lying loose in the perigastric space . To these bodies , for reasons to be presently mentioned , I propose to give the name of Statoblasts . From the earliest period that the fresh - water Polyzoa became an ...
... occur at certain seasons , lying loose in the perigastric space . To these bodies , for reasons to be presently mentioned , I propose to give the name of Statoblasts . From the earliest period that the fresh - water Polyzoa became an ...
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