A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and Foreign, Tema 28 |
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Página 38
The annulus is also composed of cells , which here occur in several layers ; these
cells are also for the most part larger than those of the disc and of a different
colour ; they are filled with air , giving to the annulus a light spongy texture , and
act ...
The annulus is also composed of cells , which here occur in several layers ; these
cells are also for the most part larger than those of the disc and of a different
colour ; they are filled with air , giving to the annulus a light spongy texture , and
act ...
Página 75
The species , so far as we are as yet acquainted with their distribution , are thus
confined to the North Temperate Zone , not one having been recorded as
occurring south of the Mediterranean in the Old World , or of Philadelphia in the
New .
The species , so far as we are as yet acquainted with their distribution , are thus
confined to the North Temperate Zone , not one having been recorded as
occurring south of the Mediterranean in the Old World , or of Philadelphia in the
New .
Página 99
... give a sort of moniliform appearance to the cænæcium ; in others , again , the
cells are long , and the orifices distant , and this condition chiefly occurs in the
free variation where , the elongation of the cells not being restrained by
adherence ...
... give a sort of moniliform appearance to the cænæcium ; in others , again , the
cells are long , and the orifices distant , and this condition chiefly occurs in the
free variation where , the elongation of the cells not being restrained by
adherence ...
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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 canal Allman already anatomy animal appearance Ascidian attached become Beneden bodies branches branchial British cavity cell characters 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 Hist 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 similar 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 | Universidad de Michigan |
| Digitalizado | 13 Feb. 2012 |
| Largo | 119 páginas |
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