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 32
... Ovary and Testis . True sexual organs have now been satisfactorily demonstrated in several of the genera of Polyzoa , both fresh - water and marine . In Alcyonella and Paludicella , I have succeeded in making a careful examination of ...
... Ovary and Testis . True sexual organs have now been satisfactorily demonstrated in several of the genera of Polyzoa , both fresh - water and marine . In Alcyonella and Paludicella , I have succeeded in making a careful examination of ...
Página 33
... ovary , and escape into the cavity of the endocyst . Attached by one extremity to the external surface of the stomach , near the commencement of the intestine , and by the other attached to the walls of the cell , and apparently also in ...
... ovary , and escape into the cavity of the endocyst . Attached by one extremity to the external surface of the stomach , near the commencement of the intestine , and by the other attached to the walls of the cell , and apparently also in ...
Página 42
... ovary be attended to , it will be seen that this body is developed at a late period from the walls of the original sac - like embryo , which have under- gone slight changes , and have become the endocyst of the more mature Polyzoon ...
... ovary be attended to , it will be seen that this body is developed at a late period from the walls of the original sac - like embryo , which have under- gone slight changes , and have become the endocyst of the more mature Polyzoon ...
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A Monograph of the Fresh-water Polyzoa: Including All the Known Species ... George James Allman Vista de fragmentos - 1856 |
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 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 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