A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and Foreign, Tema 28 |
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Página 11
... shaped cells , widely separated from each other by an intervening substance
towards the posterior part of the cćnćcium , but more closely approximated
towards the orifices . These cells are filled with a perfectly colourless and
transparent ...
... shaped cells , widely separated from each other by an intervening substance
towards the posterior part of the cćnćcium , but more closely approximated
towards the orifices . These cells are filled with a perfectly colourless and
transparent ...
Página 13
In Cristatella , where the endocyst constitutes the whole of the cćnćcium , it
presents below a flattened disc , which closely resembles the foot of a
gasteropodous mollusc , and on which this singular colony creeps about on the
stems and ...
In Cristatella , where the endocyst constitutes the whole of the cćnćcium , it
presents below a flattened disc , which closely resembles the foot of a
gasteropodous mollusc , and on which this singular colony creeps about on the
stems and ...
Página 18
The mouth and upper part of the ćsophagus are in all the genera clothed with
vibratile cilia , but I could detect no appearance of cilia further than a short
distance down this tube . The structure of the intestine closely resembles ...
The mouth and upper part of the ćsophagus are in all the genera clothed with
vibratile cilia , but I could detect no appearance of cilia further than a short
distance down this tube . The structure of the intestine closely resembles ...
Página 36
This sac is 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 ...
This sac is 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 ...
Página 59
... of multitudes of 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 .
... of multitudes of 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 .
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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
adherent admit Alcyonella alimentary canal Allman already anatomy animal appearance Ascidian attached become Beneden bodies branches branchial British cćnćcium 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 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 represented 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