A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and Foreign, Tema 28 |
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... the great beauty of their forms , and the facility with which they can in general
be observed in a living state , cannot but render them special favorites for every
lover of Nature ; and for the more profound student must confer on them a
peculiar ...
... the great beauty of their forms , and the facility with which they can in general
be observed in a living state , cannot but render them special favorites for every
lover of Nature ; and for the more profound student must confer on them a
peculiar ...
Página 12
The first thing observed is the accumulation round the nucleus of a little mass of
granular protoplasm . he midst of this a minute vacuola next shows itself ; this
becomes the cell - cavity , and gradually increases in size with the enlarging cell
...
The first thing observed is the accumulation round the nucleus of a little mass of
granular protoplasm . he midst of this a minute vacuola next shows itself ; this
becomes the cell - cavity , and gradually increases in size with the enlarging cell
...
Página 15
In Alcyonella fungosa , and in Fredericella sultana , imperfect septa may here
and there be observed , while Cristatella and Lophopus would seem to be quite
deprived of them , the cells in these genera all opening into one another .
In Alcyonella fungosa , and in Fredericella sultana , imperfect septa may here
and there be observed , while Cristatella and Lophopus would seem to be quite
deprived of them , the cells in these genera all opening into one another .
Página 16
It may be observed , when the polypide is exserted from its cell , to be in a
constant motion , which consists in an alternate elevation and depression of the
organ . The elevation is effected by distinct muscular fibres ( n ) , which are visible
...
It may be observed , when the polypide is exserted from its cell , to be in a
constant motion , which consists in an alternate elevation and depression of the
organ . The elevation is effected by distinct muscular fibres ( n ) , which are visible
...
Página 17
Delicate circular striæ may generally be distinctly observed in it , they may be
seen surrounding the stomach , and are probably muscular fibres ; they are
particularly evident in Alcyonella and Plumatella towards the fundus of the
stomach ...
Delicate circular striæ may generally be distinctly observed in it , they may be
seen surrounding the stomach , and are probably muscular fibres ; they are
particularly evident in Alcyonella and Plumatella towards the fundus of the
stomach ...
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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 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
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 | Biblioteca Nacional de Austria |
| Digitalizado | 12 Mayo 2011 |
| Largo | 119 páginas |
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