A Monograph of the Freshwater Polyzoa, Including All the Known Species, Both British and Foreign |
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While the Fresh-water Polyzoa have been carefully studied on the Continent,
especially by Van Beneden and Dumortier, they have hitherto (if we except an
excellent paper by Mr. Albany Hancock) received in this country but little attention
; and ...
While the Fresh-water Polyzoa have been carefully studied on the Continent,
especially by Van Beneden and Dumortier, they have hitherto (if we except an
excellent paper by Mr. Albany Hancock) received in this country but little attention
; and ...
Página 5
The name thus proposed by Thompson for the group whose structure he had so
well investigated was “Polyzoa.” Residing in a remote part of Ireland, and in a
great measure cut off from intercourse * Dumortier and Van Beneden (“Hist.
The name thus proposed by Thompson for the group whose structure he had so
well investigated was “Polyzoa.” Residing in a remote part of Ireland, and in a
great measure cut off from intercourse * Dumortier and Van Beneden (“Hist.
Página 14
Neither Trembley nor Baker takes any notice of this gelatinoid envelope. M.
Dumortier mentions it, and represents it in his figure,” while M. Van Beneden
believes it to be an accidental investment acquired by the animal during ...
Neither Trembley nor Baker takes any notice of this gelatinoid envelope. M.
Dumortier mentions it, and represents it in his figure,” while M. Van Beneden
believes it to be an accidental investment acquired by the animal during ...
Página 23
... though Van Beneden describes the passage of the eggs through an aperture
similarly placed in the marine genus Laguncula. It is possible that certain
apertures may exist in some of the tissues of the animal so minute as to defy our
attempts ...
... though Van Beneden describes the passage of the eggs through an aperture
similarly placed in the marine genus Laguncula. It is possible that certain
apertures may exist in some of the tissues of the animal so minute as to defy our
attempts ...
Página 24
Van Beneden” tells us that he has seen these cilia, not only on the walls of the
perigastric space, but on the external surface of the alimentary canal. I cannot,
however, confirm their existence in the latter situation; indeed, my own
observations ...
Van Beneden” tells us that he has seen these cilia, not only on the walls of the
perigastric space, but on the external surface of the alimentary canal. I cannot,
however, confirm their existence in the latter situation; indeed, my own
observations ...
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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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