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 31
... tentacular filaments are directed towards the intervals between the tentacula . The ganglion also sends off a filament ( y ) , which dives into the substance of the œsophagus just behind the mouth ; it is probably distributed to this ...
... tentacular filaments are directed towards the intervals between the tentacula . The ganglion also sends off a filament ( y ) , which dives into the substance of the œsophagus just behind the mouth ; it is probably distributed to this ...
Página 34
... tentacula ( Pl . XI , fig . 30 " ) ; these soon present themselves in the form of minute tubercles , at first confined to the body of the lophophore ( Pl . XI , fig . 30 ' ) , and then extending along the arms , which at the same time ...
... tentacula ( Pl . XI , fig . 30 " ) ; these soon present themselves in the form of minute tubercles , at first confined to the body of the lophophore ( Pl . XI , fig . 30 ' ) , and then extending along the arms , which at the same time ...
Página 36
... tentacula it has become free , and here constitutes the tentacular sheath . Some delicate fibres , the rudiments of the retractor of the polypide , may now be plainly seen extending from just behind the lophophore to the walls of the ...
... tentacula it has become free , and here constitutes the tentacular sheath . Some delicate fibres , the rudiments of the retractor of the polypide , may now be plainly seen extending from just behind the lophophore to the walls of the ...
Página 37
... tentacula . The retractor muscles show themselves as two fasciculi passing off from the base of the lophophore , and the funiculus may also be seen attached to the posterior extremity of the body . The tentacula now make their ...
... tentacula . The retractor muscles show themselves as two fasciculi passing off from the base of the lophophore , and the funiculus may also be seen attached to the posterior extremity of the body . The tentacula now make their ...
Página 39
... tentacula ; and the motions of the young animal seem to be quite passive , except so far as they may be influenced by the ciliary action of the tentacula . At the period of its escape it possesses all the essential organization of the ...
... tentacula ; and the motions of the young animal seem to be quite passive , except so far as they may be influenced by the ciliary action of the tentacula . At the period of its escape it possesses all the essential organization of the ...
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