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 16
... mouth ( Pl . II , fig . 24 , d ) is a simple edentulous orifice of a circular or slightly crescentic form , placed in the centre of the body of the lophophore , and consequently occupying the bottom of the tentacular crater . Its margin ...
... mouth ( Pl . II , fig . 24 , d ) is a simple edentulous orifice of a circular or slightly crescentic form , placed in the centre of the body of the lophophore , and consequently occupying the bottom of the tentacular crater . Its margin ...
Página 21
... mouth of the cup is closed over the whole by the action of a well - developed sphincter muscle , the tentacular crown being at the same time slightly drawn backwards by some retractor fibres , which may be seen extend- ing from the ...
... mouth of the cup is closed over the whole by the action of a well - developed sphincter muscle , the tentacular crown being at the same time slightly drawn backwards by some retractor fibres , which may be seen extend- ing from the ...
Página 46
... mouth and anus ; its position from longitudinal will thus be changed to transverse , while the transverse bars will become longitudinal , and the branchial sinus and its bars will then have the same direction as the exserted lophophore ...
... mouth and anus ; its position from longitudinal will thus be changed to transverse , while the transverse bars will become longitudinal , and the branchial sinus and its bars will then have the same direction as the exserted lophophore ...
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 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 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