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 42
... embryo as a starting point , and a series of buds , of which the last term will consist of a pair of sexual buds , the others being non - sexual ; from the sexual buds a true embryo like the first is again produced , which affords the ...
... embryo as a starting point , and a series of buds , of which the last term will consist of a pair of sexual buds , the others being non - sexual ; from the sexual buds a true embryo like the first is again produced , which affords the ...
Página 52
... embryo . From this account , however , it appears that a cavity , which represents that of the future respiratory sac , shows itself at a very early period in the interior of the embryo , having immediately behind it the first ...
... embryo . From this account , however , it appears that a cavity , which represents that of the future respiratory sac , shows itself at a very early period in the interior of the embryo , having immediately behind it the first ...
Página 61
... embryo of Alcyonella fungosa , as subsequently pointed out by Meyen , or more probably with that of Plumatella repens , there can be now no doubt . Müller's description is accompanied by figures , very good considering the imperfect ...
... embryo of Alcyonella fungosa , as subsequently pointed out by Meyen , or more probably with that of Plumatella repens , there can be now no doubt . Müller's description is accompanied by figures , very good considering the imperfect ...
Página 64
... embryos ; he figures these , and describes them at length , but his account is in some points incorrect . Raspail , in the memoir already referred to , maintains that the Leu- cophra heteroclyta ... embryo of Alcyonella 64 HISTORY .
... embryos ; he figures these , and describes them at length , but his account is in some points incorrect . Raspail , in the memoir already referred to , maintains that the Leu- cophra heteroclyta ... embryo of Alcyonella 64 HISTORY .
Página 65
... embryo of Alcyonella . He admits his inability to determine the nature of the brown egg - like bodies found in the interior of the tubes , and denies to them the office of eggs . In a subsequent note by the same author , published in ...
... embryo of Alcyonella . He admits his inability to determine the nature of the brown egg - like bodies found in the interior of the tubes , and denies to them the office of eggs . In a subsequent note by the same author , published in ...
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