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 1
... separated as a distinct group , and described by Thompson under the name of Polyzoa , and shortly after indicated by Ehrenberg under that of Bryozoa . They are chiefly inhabitants of the sea , where they may be witnessed under numerous ...
... separated as a distinct group , and described by Thompson under the name of Polyzoa , and shortly after indicated by Ehrenberg under that of Bryozoa . They are chiefly inhabitants of the sea , where they may be witnessed under numerous ...
Página 11
... separated from each other by an intervening substance towards the posterior part of the cœnocium , but more closely approximated towards the orifices . These cells are filled with a perfectly colourless and transparent fluid . Under the ...
... separated from each other by an intervening substance towards the posterior part of the cœnocium , but more closely approximated towards the orifices . These cells are filled with a perfectly colourless and transparent fluid . Under the ...
Página 12
... separating this network as a continuous layer . There can be no doubt that these fibres of the endocyst are muscular , and that it is to their presence that the high degree of contractility enjoyed by the endocyst of Lophopus is in a ...
... separating this network as a continuous layer . There can be no doubt that these fibres of the endocyst are muscular , and that it is to their presence that the high degree of contractility enjoyed by the endocyst of Lophopus is in a ...
Página 18
... separated from the rest of this cavity by a momentary hour - glass constriction . In the œsophagus there are only two layers ( Pl . III , fig . 7 , X ' , μ ' ) . These correspond to the middle and external layers of the stomach , the ...
... separated from the rest of this cavity by a momentary hour - glass constriction . In the œsophagus there are only two layers ( Pl . III , fig . 7 , X ' , μ ' ) . These correspond to the middle and external layers of the stomach , the ...
Página 19
... separated at intervals from the mass , and are slowly propelled along the tube towards the anus , where , having arrived , they are suddenly ejected into the surrounding water and rapidly whirled away by the tentacular currents . It was ...
... separated at intervals from the mass , and are slowly propelled along the tube towards the anus , where , having arrived , they are suddenly ejected into the surrounding water and rapidly whirled away by the tentacular currents . It was ...
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
action adherent admit Alcyonella alimentary canal Allman already anatomy animal appearance Ascidian attached become Beneden bodies branches branchial British 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 Hancock 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 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 Volumen18 de ¬The Ray Society |
| Autor | George James Allman |
| Editor | Ray Society, 1856 |
| Procedencia del original | la Biblioteca Estatal de Baviera |
| Digitalizado | 13 Nov. 2009 |
| Largo | 119 páginas |
| Exportar cita | BiBTeX EndNote RefMan |