A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and Foreign, Tema 28 |
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Página 16
It may The mouth ( Pl . II , fig . 24 , d ) is a simple edentulous orifice of a circular or
slightly crescentic form , placed in the centre of the body of the lophophore , and
consequently occupying the bottom of the tentacular crater . Its margin is slightly ...
It may The mouth ( Pl . II , fig . 24 , d ) is a simple edentulous orifice of a circular or
slightly crescentic form , placed in the centre of the body of the lophophore , and
consequently occupying the bottom of the tentacular crater . Its margin is slightly ...
Página 21
The mouth , which occupies its normal position in the body of the lophophore ,
opens into an cesophagus , which after a short course terminates in the stomach .
This is a large sac which lies in the bottom of the cell ; close to the pyloric orifice it
...
The mouth , which occupies its normal position in the body of the lophophore ,
opens into an cesophagus , which after a short course terminates in the stomach .
This is a large sac which lies in the bottom of the cell ; close to the pyloric orifice it
...
Página 46
... the mouth and anus ; its position from longitudinal will thus be changed to
transverse , while the transverse bars will become longitudinal , and the
branchial sinus and its bars will then have the same direction as the exserted
lophophore and ...
... the mouth and anus ; its position from longitudinal will thus be changed to
transverse , while the transverse bars will become longitudinal , and the
branchial sinus and its bars will then have the same direction as the exserted
lophophore and ...
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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