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 41
... resemblance of these ephippia with the statoblasts of the Polyzoa is singularly striking ; but , with the very different origin of the two sets of bodies , we must take care not to attribute a greater share of significance to this ...
... resemblance of these ephippia with the statoblasts of the Polyzoa is singularly striking ; but , with the very different origin of the two sets of bodies , we must take care not to attribute a greater share of significance to this ...
Página 42
... resemblance to an ordinary polypide - bud than the testicular mass has ; and to this statoblast - so far at least as position is concerned the male bud or testis in Alcyonella would therefore be related just as the female bud or ovary ...
... resemblance to an ordinary polypide - bud than the testicular mass has ; and to this statoblast - so far at least as position is concerned the male bud or testis in Alcyonella would therefore be related just as the female bud or ovary ...
Página 43
... resemblance between their organization and that of the Ascideć . Guided by this relation , an important step was finally taken by M. Milne- Edwards in distinguishing two primary series in the mollusca , characterised mainly by the ...
... resemblance between their organization and that of the Ascideć . Guided by this relation , an important step was finally taken by M. Milne- Edwards in distinguishing two primary series in the mollusca , characterised mainly by the ...
Página 53
... resemblance between the arms of the lophophore in the hippocrepian Polyzoa and the oral arms of the Brachiopoda , a resemblance singularly striking , and pointing to an important homological relation . In confirmation of this view , he ...
... resemblance between the arms of the lophophore in the hippocrepian Polyzoa and the oral arms of the Brachiopoda , a resemblance singularly striking , and pointing to an important homological relation . In confirmation of this view , he ...
Página 54
... resemblance ; where functions of the same kind are to be performed , there must necessarily be a certain degree of resemblance in the instruments , and this resem- blance may show itself not only in form but in position and relation to ...
... resemblance ; where functions of the same kind are to be performed , there must necessarily be a certain degree of resemblance in the instruments , and this resem- blance may show itself not only in form but in position and relation to ...
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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 character cilia cœnćcium 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 hćmal Hancock hippocrepian Hist homologous intestine invaginated l'Acad Lamarck layer Leidy Linnćus 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 ŕ Panache polypide Polyzoon portion 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