A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and Foreign, Tema 28 |
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The Polyzoa constitute an exceedingly natural group , and possess great
uniformity of structure , and as the fresh - water species afford fine typical
examples of the class , a work devoted to the anatomy of these will apply in all
essential points ...
The Polyzoa constitute an exceedingly natural group , and possess great
uniformity of structure , and as the fresh - water species afford fine typical
examples of the class , a work devoted to the anatomy of these will apply in all
essential points ...
Página 10
... and datua , the gullet , in allusion to the epistome placed at the entrance of the
alimentary canal ) corresponds in part with the Hippocrepia of Gervais . The
Hippocrepia of the French zoologist , however , constitute in reality an artificial
group ...
... and datua , the gullet , in allusion to the epistome placed at the entrance of the
alimentary canal ) corresponds in part with the Hippocrepia of Gervais . The
Hippocrepia of the French zoologist , however , constitute in reality an artificial
group ...
Página 11
The Polyzoa being all composite animals , the cænæcium constitutes essentially
an assemblage of little cells or chambers , of very various form , organically
connected with one another . Each chamber lodges a polypide , and its cavity is ...
The Polyzoa being all composite animals , the cænæcium constitutes essentially
an assemblage of little cells or chambers , of very various form , organically
connected with one another . Each chamber lodges a polypide , and its cavity is ...
Página 12
For reasons to be presently mentioned , it is highly probable that the endocyst is
pervaded by a system of canals of extreme delicacy , which constitute an
irregular network in its substance . Besides the structure now described , peculiar
fibres ...
For reasons to be presently mentioned , it is highly probable that the endocyst is
pervaded by a system of canals of extreme delicacy , which constitute an
irregular network in its substance . Besides the structure now described , peculiar
fibres ...
Página 13
In Cristatella , where the endocyst constitutes the whole of the cænæcium , 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 cænæcium , 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 ...
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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 ..., Tema 28 George James Allman Vista de fragmentos - 1856 |
Términos y frases comunes
adherent admit Alcyonella alimentary canal Allman already anatomy animal appearance Ascidian attached become Beneden bodies branches branchial British cænæcium 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