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 36
... alimentary canal becomes elongated into the great cul - de - sac of the stomach , the muscles are by this time all formed , and the polypide is capable of exsertion and retraction . It is now no longer dependent for its growth on the ...
... alimentary canal becomes elongated into the great cul - de - sac of the stomach , the muscles are by this time all formed , and the polypide is capable of exsertion and retraction . It is now no longer dependent for its growth on the ...
Página 37
... alimentary canal begins to appear as a minute cavity in the part of the bud farthest removed from the walls of the cell . This cavity increases in size ( figs . 13 , 14 ) , and becomes the stomach , while the intestine also shows itself ...
... alimentary canal begins to appear as a minute cavity in the part of the bud farthest removed from the walls of the cell . This cavity increases in size ( figs . 13 , 14 ) , and becomes the stomach , while the intestine also shows itself ...
Página 48
... alimentary canal on each side , until it reaches the hæmal side of the thoracic chamber , thus causing the mouth , which perforates this tube near its centre , to be related to it and to its lateral branches , exactly as the mouth in ...
... alimentary canal on each side , until it reaches the hæmal side of the thoracic chamber , thus causing the mouth , which perforates this tube near its centre , to be related to it and to its lateral branches , exactly as the mouth in ...
Página 49
... alimentary canal just behind the mouth and anus ; it thus holds to the surrounding parts in the Tunicata exactly the same rela- tion that the tentacular sheath or inverted tunic in the Polyzoa ( see figs . 8 , 9 , page 45 ) does to the ...
... alimentary canal just behind the mouth and anus ; it thus holds to the surrounding parts in the Tunicata exactly the same rela- tion that the tentacular sheath or inverted tunic in the Polyzoa ( see figs . 8 , 9 , page 45 ) does to the ...
Página 52
... alimentary canal as a tube of uniform diameter bent into a loop . The walls of this cavity are at first in close apposition with those of the thoracic chamber , which completely encloses it , so that the two cavities at this stage ...
... alimentary canal as a tube of uniform diameter bent into a loop . The walls of this cavity are at first in close apposition with those of the thoracic chamber , which completely encloses it , so that the two cavities at this stage ...
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