A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and ForeignRay Society, 1856 - 119 páginas |
Dentro del libro
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Página 7
... Ovary . g . Retractor muscle . Let us imagine an alimentary canal , consisting of œsophagus , stomach , and intestine , to be furnished at its origin with long ciliated tentacula , and to have a single nervous ganglion situated on one ...
... Ovary . g . Retractor muscle . Let us imagine an alimentary canal , consisting of œsophagus , stomach , and intestine , to be furnished at its origin with long ciliated tentacula , and to have a single nervous ganglion situated on one ...
Página 21
... ovary is an irregularly shaped mass , situated between the cardiac and pyloric orifices of the stomach , and the animal appears to be unisexual , the testis occupying the place of the ovary in other individuals . The stalk on which the ...
... ovary is an irregularly shaped mass , situated between the cardiac and pyloric orifices of the stomach , and the animal appears to be unisexual , the testis occupying the place of the ovary in other individuals . The stalk on which the ...
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 38
... ovary had not yet been detected . Into this error I fell myself ; * but I have now become convinced that they are a peculiar form of bud , and must on no account be confounded with genuine ova . They are produced in the funiculus , from ...
... ovary had not yet been detected . Into this error I fell myself ; * but I have now become convinced that they are a peculiar form of bud , and must on no account be confounded with genuine ova . They are produced in the funiculus , from ...
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