A Monograph of the Freshwater Polyzoa, Including All the Known Species, Both British and Foreign |
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Página 20
... together the two tentacula which spring from the points of the arms, and
completing the tentacular crater so as entirely to disguise the hippocrepian
character, and give to the crown of tentacula the form presented by the
infundibulate genera.
... together the two tentacula which spring from the points of the arms, and
completing the tentacular crater so as entirely to disguise the hippocrepian
character, and give to the crown of tentacula the form presented by the
infundibulate genera.
Página 29
One of these is placed within the other. and gives rise to the membranous cup
which projects from the lips of the orifice in the exserted state of the polypide. This
cup, therefore, which may plainly be seen under a proper illumination to consist
of ...
One of these is placed within the other. and gives rise to the membranous cup
which projects from the lips of the orifice in the exserted state of the polypide. This
cup, therefore, which may plainly be seen under a proper illumination to consist
of ...
Página 31
When it arrives at the extremity of the arm it turns on itself, and in its retrograde
course gives off similar filaments to the tentacula placed upon the inner margin. I
have thus traced it back to the base of the arms, but have here failed in my ...
When it arrives at the extremity of the arm it turns on itself, and in its retrograde
course gives off similar filaments to the tentacula placed upon the inner margin. I
have thus traced it back to the base of the arms, but have here failed in my ...
Página 36
9) find little wanting to give to the polypide and its cell the form presented by the
adult. Up to this period the young polypide has been entirely shut off from all
communication with the external water, and its nutrition must have been effected
...
9) find little wanting to give to the polypide and its cell the form presented by the
adult. Up to this period the young polypide has been entirely shut off from all
communication with the external water, and its nutrition must have been effected
...
Página 37
To these bodies, for reasons to be presently mentioned, I propose to give the
name of Statoblasts. From the earliest period that the fresh-water Polyzoa
became an object of study, the statoblasts attracted the attention of observers.
Their form is ...
To these bodies, for reasons to be presently mentioned, I propose to give the
name of Statoblasts. From the earliest period that the fresh-water Polyzoa
became an object of study, the statoblasts attracted the attention of observers.
Their form is ...
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A Monograph of the Fresh-water Polyzoa: Including All the Known ..., Volumen28 George James Allman Vista de fragmentos - 1856 |
A Monograph of the Fresh-water Polyzoa: Including All the Known Species ... George James Allman Vista de fragmentos - 1856 |
Términos y frases comunes
adherent admit Alcyonella alimentary alimentary canal Allman already anatomy animal appearance attached become Beneden bodies branches branchial British canal cavity cell characters cilia closely coenoecium complete condition connected consists constitutes contained continuous 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 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 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 Freshwater 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 |
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