A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and ForeignRay Society, 1856 - 119 páginas |
Dentro del libro
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Página 11
... closely approximated towards the orifices . These cells are filled with a perfectly colourless and transparent fluid . Under the action of acetic acid each is distinctly seen to be bounded by a double outline , and to contain a large ...
... closely approximated towards the orifices . These cells are filled with a perfectly colourless and transparent fluid . Under the action of acetic acid each is distinctly seen to be bounded by a double outline , and to contain a large ...
Página 13
... closely resembles the foot of a gasteropodous mollusc , and on which this singular colony creeps about on the stems and leaves of aquatic plants , exposing its beautiful plumes to the light and warmth of the sun ( Pl . I , fig . 2 ) ...
... closely resembles the foot of a gasteropodous mollusc , and on which this singular colony creeps about on the stems and leaves of aquatic plants , exposing its beautiful plumes to the light and warmth of the sun ( Pl . I , fig . 2 ) ...
Página 18
... closely resembles that of the œsophagus ; vibratile cilia however , are altogether absent . In Cristatella , the cells of the internal layer corresponding to the middle layer of the stomach are large , and filled , in the well - fed ...
... closely resembles that of the œsophagus ; vibratile cilia however , are altogether absent . In Cristatella , the cells of the internal layer corresponding to the middle layer of the stomach are large , and filled , in the well - fed ...
Página 36
... closely adherent to the polypide behind the lophophore , but upon the lophophore and tentacula it has become free , and here constitutes the tentacular sheath . Some delicate fibres , the rudiments of the retractor of the polypide , may ...
... closely adherent to the polypide behind the lophophore , but upon the lophophore and tentacula it has become free , and here constitutes the tentacular sheath . Some delicate fibres , the rudiments of the retractor of the polypide , may ...
Página 59
... closely compacted tubes , each of which opened upon the surface of the mass by a pentagonal or hexagonal orifice , which allowed of the exsertion . of a polypoid body in all respects resembling those of Trembley and Rösel . To his newly ...
... closely compacted tubes , each of which opened upon the surface of the mass by a pentagonal or hexagonal orifice , which allowed of the exsertion . of a polypoid body in all respects resembling those of Trembley and Rösel . To his newly ...
Otras ediciones - Ver todas
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 Species ... George James Allman Sin vista previa disponible - 2009 |
Términos y frases comunes
action adherent admit Alcyonella alimentary canal Allman already anatomy animal appearance Ascidian attached become Beneden bodies branches branchial British 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 Hancock 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 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