A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and Foreign, Tema 28 |
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Página 12
These are situated on its inner surface , where they constitute a well - marked
layer composed of a network of transverse and longitudinal fibres over the whole
extent of the endocyst . I have even succeeded in separating this network as a ...
These are situated on its inner surface , where they constitute a well - marked
layer composed of a network of transverse and longitudinal fibres over the whole
extent of the endocyst . I have even succeeded in separating this network as a ...
Página 50
... + or that opposite to the ganglion , its whole course in the Polyzoa is as
invariably towards the neural or ganglionic side . To the uniformity of plan now
attempted to be demonstrated among the various members of the molluscoid
series , the ...
... + or that opposite to the ganglion , its whole course in the Polyzoa is as
invariably towards the neural or ganglionic side . To the uniformity of plan now
attempted to be demonstrated among the various members of the molluscoid
series , the ...
Página 89
When a living specimen is examined in the water , its whole surface seems
covered with a whitish down , which a slight examination shows to be occasioned
by the protrusion of innumerable polypides . When removed from the water , the ...
When a living specimen is examined in the water , its whole surface seems
covered with a whitish down , which a slight examination shows to be occasioned
by the protrusion of innumerable polypides . When removed from the water , the ...
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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 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 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