A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and Foreign |
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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 ...
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 ...
Página 11
Each chamber lodges a polypide , and its cavity is either shut off from those of the neighbouring chambers , or freely communicates with them . In every instance * the polypide can be protruded from its cell , and again withdrawn into ...
Each chamber lodges a polypide , and its cavity is either shut off from those of the neighbouring chambers , or freely communicates with them . In every instance * the polypide can be protruded from its cell , and again withdrawn into ...
Página 12
In the midst of this a minute vacuola next shows itself ; this becomes the cell - cavity , and gradually increases in size with the enlarging cell ; the nucleus is persistent , remaining attached to the cell - wall .
In the midst of this a minute vacuola next shows itself ; this becomes the cell - cavity , and gradually increases in size with the enlarging cell ; the nucleus is persistent , remaining attached to the cell - wall .
Página 13
They are about theth of an inch in the longer diameter , larger at one end than at the other , and in the large end they appear to contain a minute cavity ( fig . 14 ) , which under the action of acetic acid dilates and fills nearly the ...
They are about theth of an inch in the longer diameter , larger at one end than at the other , and in the large end they appear to contain a minute cavity ( fig . 14 ) , which under the action of acetic acid dilates and fills nearly the ...
Página 14
The septum thus formed is rendered complete by the aperture in its centre being closed by a peculiar body , which projects into the cavity of the cell at each side . The structure of this body is remarkable ; it consists of a central ...
The septum thus formed is rendered complete by the aperture in its centre being closed by a peculiar body , which projects into the cavity of the cell at each side . The structure of this body is remarkable ; it consists of a central ...
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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 |