A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and Foreign, Tema 28 |
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In fixing the exact limits of the species , some difficulty has been experienced . I
have however , deemed it best to describe as a distinct species every well -
marked variation of form which I could not find connected by intermediate
gradations ...
In fixing the exact limits of the species , some difficulty has been experienced . I
have however , deemed it best to describe as a distinct species every well -
marked variation of form which I could not find connected by intermediate
gradations ...
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which I could not find connected by intermediate gradations with other forms ,
and which could not , with probability , be referred to the accidental influence of
external agencies . It is possible that some of the forms here described as distinct
...
which I could not find connected by intermediate gradations with other forms ,
and which could not , with probability , be referred to the accidental influence of
external agencies . It is possible that some of the forms here described as distinct
...
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... only strongly opposed the views of Peysonelle , while laying them before the
Academy , but , through consideration for the reputation of the author , deemed it
right to suppress his name in connection with so absurd and visionary a doctrine .
... only strongly opposed the views of Peysonelle , while laying them before the
Academy , but , through consideration for the reputation of the author , deemed it
right to suppress his name in connection with so absurd and visionary a doctrine .
Página 5
... demonstrated in a very complete manner the anatomy of the Flustræ , but was
the first to call attention to the close connection of their structure with that of the
Ascidiæ , and the important bearing of this connection on their systematic rank .
... demonstrated in a very complete manner the anatomy of the Flustræ , but was
the first to call attention to the close connection of their structure with that of the
Ascidiæ , and the important bearing of this connection on their systematic rank .
Página 11
The Polyzoa being all composite animals , the cænæcium constitutes essentially
an assemblage of little cells or chambers , of very various form , organically
connected with one another . Each chamber lodges a polypide , and its cavity is ...
The Polyzoa being all composite animals , the cænæcium constitutes essentially
an assemblage of little cells or chambers , of very various form , organically
connected with one another . Each chamber lodges a polypide , and its cavity is ...
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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
adherent admit Alcyonella alimentary alimentary canal Allman already anatomy animal appearance Ascidian attached become Beneden bodies branches branchial British cænæcium canal cavity cell character 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 structure surface surrounding tentacula transparent transverse Trembley true tubes Tubularia tunic Tunicata walls whole young