A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and Foreign, Tema 28 |
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Página 5
He then goes on to compare the walls of the body cavity in Gorgonia , Isis ,
Alcyonium , & c . , to the tunics of an Ascidian or the mantle of an ordinary Mollusc
, a comparison which plainly shows that he had no idea whatever of the relation
in ...
He then goes on to compare the walls of the body cavity in Gorgonia , Isis ,
Alcyonium , & c . , to the tunics of an Ascidian or the mantle of an ordinary Mollusc
, a comparison which plainly shows that he had no idea whatever of the relation
in ...
Página 6
... which I have employed in the present Memoir.t Notwithstanding , however , the
completeness with which the ascidian type of structure had now been recognised
in the Polyzoa , naturalists had not yet emancipated themselves from the old ...
... which I have employed in the present Memoir.t Notwithstanding , however , the
completeness with which the ascidian type of structure had now been recognised
in the Polyzoa , naturalists had not yet emancipated themselves from the old ...
Página 9
... of a blood - vascular system , I shall call that region of a Polyzoon on which the
nervous ganglion lies the “ neural , ” and the opposite region , that , namely ,
which corresponds to the part of an Ascidian which contains the heart , the “
hćmal .
... of a blood - vascular system , I shall call that region of a Polyzoon on which the
nervous ganglion lies the “ neural , ” and the opposite region , that , namely ,
which corresponds to the part of an Ascidian which contains the heart , the “
hćmal .
Página 43
Under the one head it is maintained that the respiratory sac of the Ascidian has
its representative in the pharynx of the Polyzoon , and that the rudimentary
tentacula at the orifice of this sac are homologous with the tentacula of the
Polyzoon .
Under the one head it is maintained that the respiratory sac of the Ascidian has
its representative in the pharynx of the Polyzoon , and that the rudimentary
tentacula at the orifice of this sac are homologous with the tentacula of the
Polyzoon .
Página 44
In advocating the homology of the respiratory sac of the Ascidian with the
tentacular crown of the Polyzoon , some zoologists , among whom must be
especially mentioned M. Van Benedenf , maintain that the longitudinal bars of the
sac ...
In advocating the homology of the respiratory sac of the Ascidian with the
tentacular crown of the Polyzoon , some zoologists , among whom must be
especially mentioned M. Van Benedenf , maintain that the longitudinal bars of the
sac ...
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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 admit Alcyonella alimentary canal Allman already anatomy animal appearance Ascidian attached become Beneden bodies branches branchial British cćnćcium cavity cell character cilia closely complete condition connected consists constitutes contained continuous corresponding Cristatella described detected disc distinct Dumortier ectocyst edit endocyst entire epistome examined existence extending external extremity fibres fluid Fredericella fresh-water Polyzoa genera genus Gervais gives Hist important internal latter layer Leidy lophophore Lophopus margin mass Mém membrane memoir minute mouth muscles Natural naturalists nearly observed occur organ orifice Original figures Paludicella passes Plumatella Plumatella repens Polype polypide Polyzoon portion present published relations repens represented resemblance retraction retractor Rösel seen separated sheath side space species specimens statoblasts stomach stones structure surface surrounding tentacula transparent transverse Trembley true tubes Tubularia tunic Tunicata walls whole young
Información bibliográfica
| Título | A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and Foreign, Tema 28 A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and Foreign, George James Allman Volumen13 de DE-601)130488305: Ray Society Publications, Ray Society Ray Society, Ray Society Volumen28 de Ray society ... [Publications |
| Autor | George James Allman |
| Editor | Ray Society, 1856 |
| Procedencia del original | la Biblioteca Estatal de Baviera |
| Digitalizado | 13 Nov. 2009 |
| Largo | 119 páginas |
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