A Monograph of the Freshwater Polyzoa, Including All the Known Species, Both British and Foreign |
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Página 6
... with the Polypes, and the Polyzoa, therefore, long continued to be classed with
the Polypes, of which they were still considered as a group, though with distinct
peculiarities, through which the Polypes manifested an affinity with the Tunicata.
... with the Polypes, and the Polyzoa, therefore, long continued to be classed with
the Polypes, of which they were still considered as a group, though with distinct
peculiarities, through which the Polypes manifested an affinity with the Tunicata.
Página 15
The fact of cellulose being a constituent of the test of the Tunicata, induced me to
look for it in the ectocyst of the Polyzoa, but I have never succeeded in obtaining
satisfactory evidence of its existence in any of the tissues of the Polyzoa, either ...
The fact of cellulose being a constituent of the test of the Tunicata, induced me to
look for it in the ectocyst of the Polyzoa, but I have never succeeded in obtaining
satisfactory evidence of its existence in any of the tissues of the Polyzoa, either ...
Página 43
One of these, the Molluscoida, included the Polyzoa and Tunicata; the other, the
Mollusca proper, embraced all the other members of the molluscan sub-kingdom.
The affinities of the Tunicata and Polyzoa being thus fully recognised, it is of ...
One of these, the Molluscoida, included the Polyzoa and Tunicata; the other, the
Mollusca proper, embraced all the other members of the molluscan sub-kingdom.
The affinities of the Tunicata and Polyzoa being thus fully recognised, it is of ...
Página 46
In connection with the tentacular crown, there is another part of the organization
of the Polyzoa for which we have still to find an equivalent, and which without
comparison with the Tunicata would remain inexplicable, namely the epistome of
...
In connection with the tentacular crown, there is another part of the organization
of the Polyzoa for which we have still to find an equivalent, and which without
comparison with the Tunicata would remain inexplicable, namely the epistome of
...
Página 47
Now nearly all the changes which we have thus hypothetically supposed to take
place in Clavelina, in order to convert its branchial sac into the tentacular crown
of Plumatella, do actually occur in other genera of Tunicata, some in one, and ...
Now nearly all the changes which we have thus hypothetically supposed to take
place in Clavelina, in order to convert its branchial sac into the tentacular crown
of Plumatella, do actually occur in other genera of Tunicata, some in one, and ...
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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 ..., Tema 28 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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