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 29
... crown and the excitement of the vortices in the surrounding fluid , by the countless cilia which instantly commence their untiring vibration on the sides of the tentacula . The mechanism of retraction is easily understood . Here the ...
... crown and the excitement of the vortices in the surrounding fluid , by the countless cilia which instantly commence their untiring vibration on the sides of the tentacula . The mechanism of retraction is easily understood . Here the ...
Página 36
... crown of tentacula , is also seen to be connected by a short , thick , fleshy mass , with the walls of the cell ... crown of the polypide , and the last stage of development is entered on . The tentacular crown rapidly acquires its ...
... crown of tentacula , is also seen to be connected by a short , thick , fleshy mass , with the walls of the cell ... crown of the polypide , and the last stage of development is entered on . The tentacular crown rapidly acquires its ...
Página 43
... crown of the Polyzoa . I have carefully examined all that has been urged in favour of each of these views , and I believe that the evidence preponderates on the side of considering the respiratory sac of the Ascidian as truly ...
... crown of the Polyzoa . I have carefully examined all that has been urged in favour of each of these views , and I believe that the evidence preponderates on the side of considering the respiratory sac of the Ascidian as truly ...
Página 44
... crown of the Polyzoon . Now this view is certainly untenable . I have in another place endeavoured to show that while the respiratory sac of the Ascidian has undoubtedly its homologue in the tentacular crown of the Polyzoon , it is the ...
... crown of the Polyzoon . Now this view is certainly untenable . I have in another place endeavoured to show that while the respiratory sac of the Ascidian has undoubtedly its homologue in the tentacular crown of the Polyzoon , it is the ...
Página 45
... crown of the Polyzoon indefensible . Without a knowledge of the Hippocrepian Polyzoa , it would , perhaps , have been im- possible to arrive at anything like a satisfactory conclusion on this point ; the peculiarities of these Polyzoa ...
... crown of the Polyzoon indefensible . Without a knowledge of the Hippocrepian Polyzoa , it would , perhaps , have been im- possible to arrive at anything like a satisfactory conclusion on this point ; the peculiarities of these Polyzoa ...
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