A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and Foreign, Tema 28Ray Society, 1856 - 119 páginas |
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Página 43
... relations of the Polyzoa began at last to be recognised in an obvious resemblance between their organization and that of the Ascidea . Guided by this relation , an important step was finally taken by M. Milne- Edwards in distinguishing ...
... relations of the Polyzoa began at last to be recognised in an obvious resemblance between their organization and that of the Ascidea . Guided by this relation , an important step was finally taken by M. Milne- Edwards in distinguishing ...
Página 48
... relations here dwelt on , the infundibulate genera present no difficulty , for the orbicular lophophore , after all , is but an unimportant modification of the crescentic , and is connected to it by a series of intermediate forms . The ...
... relations here dwelt on , the infundibulate genera present no difficulty , for the orbicular lophophore , after all , is but an unimportant modification of the crescentic , and is connected to it by a series of intermediate forms . The ...
Página 54
... relations from mere 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 ...
... relations from mere 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 ...
Otras ediciones - Ver todas
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 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