A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and Foreign |
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Página 1
... were at last , by the nearly simultaneous investigations of several naturalists , separated as a distinct group , and described by Thompson under the name of Polyzoa , and shortly after indicated by Ehrenberg under that of Bryozoa .
... were at last , by the nearly simultaneous investigations of several naturalists , separated as a distinct group , and described by Thompson under the name of Polyzoa , and shortly after indicated by Ehrenberg under that of Bryozoa .
Página 11
... widely 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 ...
... widely 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 ...
Página 12
These are situated on its inner surface , where they constitute a well - marked layer composed of a network of transverse and longitudinal fibres over the whole extent of the endocyst . I have even succeeded in separating this network ...
These are situated on its inner surface , where they constitute a well - marked layer composed of a network of transverse and longitudinal fibres over the whole extent of the endocyst . I have even succeeded in separating this network ...
Página 18
... that the peculiar peristaltic action of the walls is more marked in it than in any other part of the gastric cavity , while it is every now and then separated from the rest of this cavity by a momentary hour - glass constriction .
... that the peculiar peristaltic action of the walls is more marked in it than in any other part of the gastric cavity , while it is every now and then separated from the rest of this cavity by a momentary hour - glass constriction .
Página 19
nutritious elements , portions in the form of roundish pellets become 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 ...
nutritious elements , portions in the form of roundish pellets become 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 ...
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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
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 |