A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and Foreign, Tema 28 |
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Of all the known fresh - water genera there are but two , namely , Pectinatella and
Urnatella , which I have not yet had an opportunity of examining in a living
condition . Both these genera , each consisting of a single species , are confined
to ...
Of all the known fresh - water genera there are but two , namely , Pectinatella and
Urnatella , which I have not yet had an opportunity of examining in a living
condition . Both these genera , each consisting of a single species , are confined
to ...
Página 7
... we shall have perhaps as correct an idea — apart from all theoretical
considerations of homology or derivation from an archetype — as can be
conveyed of the essential structure of a Polyzoon in its simplest and most
generalised condition .
... we shall have perhaps as correct an idea — apart from all theoretical
considerations of homology or derivation from an archetype — as can be
conveyed of the essential structure of a Polyzoon in its simplest and most
generalised condition .
Página 8
... producing one or more precisely similar systems holding a definite position
relatively to one another , while all continue organically united , and we shall then
have the actual condition presented by the Polyzoa in their fully developed state .
... producing one or more precisely similar systems holding a definite position
relatively to one another , while all continue organically united , and we shall then
have the actual condition presented by the Polyzoa in their fully developed state .
Página 11
... remaining in a permanently inverted condition ; in this respect differing
remarkably from the marine species , in which the evertion of the endocyst is ,
perhaps , in all cases , if we except the anomalous genus Pedicellina , complete .
... remaining in a permanently inverted condition ; in this respect differing
remarkably from the marine species , in which the evertion of the endocyst is ,
perhaps , in all cases , if we except the anomalous genus Pedicellina , complete .
Página 12
In this condition it continues till it terminates by being attached to the base of the
tentacular crown . This thin , non - contractile portion of the endocyst constitutes
the tentacular sheath which encloses and protects the tentacula during the ...
In this condition it continues till it terminates by being attached to the base of the
tentacular crown . This thin , non - contractile portion of the endocyst constitutes
the tentacular sheath which encloses and protects the tentacula during the ...
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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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