A Monograph of the Fresh-water Polyzoa: Including All the Known Species, Both British and Foreign |
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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 ...
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 ...
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... to guard , and λaqua , 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 ...
... to guard , and λaqua , 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 ...
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The Polyzoa being all composite animals , the canoecium 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 ...
The Polyzoa being all composite animals , the canoecium 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 ...
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These are situated on its inner surface , where they constitute a well - marked layer composed of a network of transverse and ... This thin , non - contractile portion of the endocyst constitutes the tentacular sheath which encloses and ...
These are situated on its inner surface , where they constitute a well - marked layer composed of a network of transverse and ... This thin , non - contractile portion of the endocyst constitutes the tentacular sheath which encloses and ...
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In Cristatella , where the endocyst constitutes the whole of the cœnocium , 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 ...
In Cristatella , where the endocyst constitutes the whole of the cœnocium , 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 ...
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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
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