A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and Foreign, Tema 28 |
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Página 20
Some of those cells which lie upon the back of the tentacle become in certain
genera enlarged , giving a vesicular appearance to the organ ; this is particularly
evident in Cristatella . The internal layer is a delicate transparent membrane , in ...
Some of those cells which lie upon the back of the tentacle become in certain
genera enlarged , giving a vesicular appearance to the organ ; this is particularly
evident in Cristatella . The internal layer is a delicate transparent membrane , in ...
Página 22
... or less upon each tentacle , as a narrow triangular process , so as to present a
sort of scalloped or festooned appearance ; the festooning of the margin is most
marked in Fredericella ; in some species of Plumatella it is scarcely perceptible .
... or less upon each tentacle , as a narrow triangular process , so as to present a
sort of scalloped or festooned appearance ; the festooning of the margin is most
marked in Fredericella ; in some species of Plumatella it is scarcely perceptible .
Página 25
Action : it elevates the epistome , and draws it away from the mouth . * M. Van
Beneden has himself given up his earlier views upon this point , and has referred
the appearance in question to its proper cause . Dumortier and Van Beneden ...
Action : it elevates the epistome , and draws it away from the mouth . * M. Van
Beneden has himself given up his earlier views upon this point , and has referred
the appearance in question to its proper cause . Dumortier and Van Beneden ...
Página 26
... and the condition of the corresponding parts in Paludicella , as well as in
certain marine Polyzoa , is altogether in favour of their muscularity ; but they do
not always present the appearance of distinct fibrous fascicles , and I have been
unable ...
... and the condition of the corresponding parts in Paludicella , as well as in
certain marine Polyzoa , is altogether in favour of their muscularity ; but they do
not always present the appearance of distinct fibrous fascicles , and I have been
unable ...
Página 33
The testicle was coexistent with the ovary , and was loaded with spermatozoa ,
multitudes of which projected from its surface , presenting quite the same
appearance as in Alcyonella , while many had escaped from the testicle , and
were ...
The testicle was coexistent with the ovary , and was loaded with spermatozoa ,
multitudes of which projected from its surface , presenting quite the same
appearance as in Alcyonella , while many had escaped from the testicle , and
were ...
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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 canal Allman already anatomy animal appearance Ascidian attached become Beneden bodies branches branchial British cćnćcium 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 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 represented 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 | la Biblioteca Estatal de Baviera |
| Digitalizado | 13 Nov. 2009 |
| Largo | 119 páginas |
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