A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and Foreign, Tema 28 |
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Página 51
In deriving the ascidian form from the archetype , “ it is to be remarked , ” he says ,
the first place , that the pharynx , large in the Polyzoa , becomes comparatively
enormous in the Ascidians ; while the tentacles , which were very large in the ...
In deriving the ascidian form from the archetype , “ it is to be remarked , ” he says ,
the first place , that the pharynx , large in the Polyzoa , becomes comparatively
enormous in the Ascidians ; while the tentacles , which were very large in the ...
Página 73
the most important difference , consisting in the greater number of tentacula , is
founded on a figure of Paludicella Ehrenbergi , given by myself some years
before , and which having been incorrectly engraved with too many tentacles ,
has thus ...
the most important difference , consisting in the greater number of tentacula , is
founded on a figure of Paludicella Ehrenbergi , given by myself some years
before , and which having been incorrectly engraved with too many tentacles ,
has thus ...
Página
Some tentacles have begun to develope themselves from the margin of the
lophophore . 31. An embryo containing two polypides . 32. The same more
advanced . The polypides have acquired nearly their perfect development . 33.
The same ...
Some tentacles have begun to develope themselves from the margin of the
lophophore . 31. An embryo containing two polypides . 32. The same more
advanced . The polypides have acquired nearly their perfect development . 33.
The same ...
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A Monograph of the Fresh-water Polyzoa: Including All the Known ..., Tema 28 George James Allman Vista de fragmentos - 1856 |
Términos y frases comunes
adherent admit Alcyonella alimentary alimentary canal Allman already anatomy animal appearance Ascidian attached become Beneden bodies branches branchial British canal cavity cell characters cilia closely complete condition connected consists constitutes contained continuous corresponding Cristatella crown 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 important internal latter layer Leidy lophophore Lophopus margin mass Mém membrane memoir minute mouth muscles Natural naturalists nearly observed occur organs 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, 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 | Universidad de Michigan |
| Digitalizado | 13 Feb. 2012 |
| Largo | 119 páginas |
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