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 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 45
... relations in question by comparing an Ascidian Tunicate with a Hippo- crepian Polyzoon , a Clavelina , for example , with a Plumatella , a comparison which the accompanying diagrams ( figs . 6-9 ) will render easy . Now it does not need ...
... relations in question by comparing an Ascidian Tunicate with a Hippo- crepian Polyzoon , a Clavelina , for example , with a Plumatella , a comparison which the accompanying diagrams ( figs . 6-9 ) will render easy . Now it does not need ...
Página 46
... relation with the digestive tube , those of the Ascidia are mere appendages of the internal tunic . The real homology of the Ascidian tentacula is , in fact , to be found in the tentacular mantel - fringe of a lamellibranchiate mollusc ...
... relation with the digestive tube , those of the Ascidia are mere appendages of the internal tunic . The real homology of the Ascidian tentacula is , in fact , to be found in the tentacular mantel - fringe of a lamellibranchiate mollusc ...
Página 47
... relations of the parts in Salpa and Doliolum . The relation of the parts in Doliolum is particularly interesting , and of great importance Fig . 10 . Fig . 11 . u d . d .. ---- a + b d d " d a + b с Fig . 10. Plan of Salpa . ab ...
... relations of the parts in Salpa and Doliolum . The relation of the parts in Doliolum is particularly interesting , and of great importance Fig . 10 . Fig . 11 . u d . d .. ---- a + b d d " d a + b с Fig . 10. Plan of Salpa . ab ...
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 ...
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