A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and Foreign, Tema 28 |
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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
...
Página 4
Numerous systems were accordingly from time to time proposed , which ,
however , were all more or less artificial , and involved the fundamental error of
assuming the external calcareous or horny covering as a character of primary
importance ...
Numerous systems were accordingly from time to time proposed , which ,
however , were all more or less artificial , and involved the fundamental error of
assuming the external calcareous or horny covering as a character of primary
importance ...
Página 7
Further , let us imagine the digestive tube thus constituted to be suspended in a
fluid contained in a membranous sac with two openings , one for the mouth and
the other for the vent ; the tentacula alone being external to the sac . Let us still ...
Further , let us imagine the digestive tube thus constituted to be suspended in a
fluid contained in a membranous sac with two openings , one for the mouth and
the other for the vent ; the tentacula alone being external to the sac . Let us still ...
Página 8
... was formerly known under the names of Polypary and Polypidome , I have
applied the term Cænæcium.t The cænæcium is composed almost universally of
two perfectly distinct tunics ; to the external I have given the name of Ectocyst , I
and ...
... was formerly known under the names of Polypary and Polypidome , I have
applied the term Cænæcium.t The cænæcium is composed almost universally of
two perfectly distinct tunics ; to the external I have given the name of Ectocyst , I
and ...
Página 11
The attachment of the endocyst to the base of the tentacular crown closes the
cænæcial chambers externally , while the polypide is thus suspended in the
midst of the fluid with which these chambers are filled . If we examine the
endocyst ...
The attachment of the endocyst to the base of the tentacular crown closes the
cænæcial chambers externally , while the polypide is thus suspended in the
midst of the fluid with which these chambers are filled . If we examine the
endocyst ...
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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 cænæcium 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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