A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and ForeignRay Society, 1856 - 119 páginas |
Dentro del libro
Página 10
... sheath imperfect . Polypide completely retractile ; evagination perfect ; orifice of cell destitute of move- able appendage . Polypide completely retractile ; evagination perfect ; a circle of setæ attached to the in- invertible portion ...
... sheath imperfect . Polypide completely retractile ; evagination perfect ; orifice of cell destitute of move- able appendage . Polypide completely retractile ; evagination perfect ; a circle of setæ attached to the in- invertible portion ...
Página 12
... sheath which encloses and protects the tentacula during the retracted state of the polypide . Near the spot where the endocyst passes into the tentacular sheath , there appears to exist , at least in Lophopus , a circular canal , which ...
... sheath which encloses and protects the tentacula during the retracted state of the polypide . Near the spot where the endocyst passes into the tentacular sheath , there appears to exist , at least in Lophopus , a circular canal , which ...
Página 17
... sheath just below the mouth , and at the concave side of the lophophore . b . Gymnolæmata . In Paludicella articulata , the mouth ( Pl . X , fig . 5 ) is a perfectly circular orifice , with slightly projectile margin , and is totally ...
... sheath just below the mouth , and at the concave side of the lophophore . b . Gymnolæmata . In Paludicella articulata , the mouth ( Pl . X , fig . 5 ) is a perfectly circular orifice , with slightly projectile margin , and is totally ...
Página 24
... sheath in certain species during the 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 ...
... sheath in certain species during the 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 ...
Página 26
... sheath in a plane parallel to that of their origin , and just behind the termi- nation of the anterior parieto - vaginal muscles . Their action steadies the sheath , and regulates its position during the protrusion of the polypide ...
... sheath in a plane parallel to that of their origin , and just behind the termi- nation of the anterior parieto - vaginal muscles . Their action steadies the sheath , and regulates its position during the protrusion of the polypide ...
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