A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and Foreign, Tema 28 |
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Página 33
Attached by one extremity to the external surface of the stomach , near the
commencement of the intestine , and by the other attached to the walls of the cell
, and apparently also in connection at this place with the ovary , is a cylindrical
flexible ...
Attached by one extremity to the external surface of the stomach , near the
commencement of the intestine , and by the other attached to the walls of the cell
, and apparently also in connection at this place with the ovary , is a cylindrical
flexible ...
Página 79
Upon the convex surface are arranged the orifices through which the polypides
emerge , they are placed near the margin , and run round the entire conocium in
three regular concentric series , which alternate with one another , and leave an ...
Upon the convex surface are arranged the orifices through which the polypides
emerge , they are placed near the margin , and run round the entire conocium in
three regular concentric series , which alternate with one another , and leave an ...
Página 89
Alcyonella fungosa presents itself in the form of brown fungoid masses of very
variable size and shape , attached to the surface of different fixed objects , as
stones , pieces of wood , fresh - water shells , & c . The masses frequently acquire
a ...
Alcyonella fungosa presents itself in the form of brown fungoid masses of very
variable size and shape , attached to the surface of different fixed objects , as
stones , pieces of wood , fresh - water shells , & c . The masses frequently acquire
a ...
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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 Ascidian attached become Beneden bodies branches branchial British canal cavity cell character cilia closely 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 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 stones structure surface surrounding tentacula transparent transverse Trembley true tubes Tubularia tunic Tunicata walls whole young